| 
           BORROWINGS (Tables)
  
         | 
        9 Months Ended | 
      
      
        | 
           Sep. 30, 2014 
         | 
      
      
        | BORROWINGS [Abstract] | 
         
 | 
      
      
        | Short-Term Borrowings | 
        
 
		
			Total short-term borrowings consist of the following as of September 30, 2014 and December 31, 2013 (dollars in thousands): 
		 
		
			 
		 
		
			 
		 
		
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						September 30, 
				 | 
				
					 
						  
				 | 
				
					 
						December 31, 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						2014 
				 | 
				
					 
						  
				 | 
				
					 
						2013 
				 | 
			 
			
				| 
					 
						Securities sold under agreements to repurchase 
				 | 
				
					 
						$ 
				 | 
				
33,517 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
52,455 
				 | 
			 
			
				| 
					 
						Other short-term borrowings 
				 | 
				
					 
						  
				 | 
				
195,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
211,500 
				 | 
			 
			
				| 
					 
						Total short-term borrowings 
				 | 
				
					 
						$ 
				 | 
				
228,517 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
263,955 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Maximum month-end outstanding balance 
				 | 
				
					 
						$ 
				 | 
				
274,281 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
263,955 
				 | 
			 
			
				| 
					 
						Average outstanding balance during the period 
				 | 
				
					 
						  
				 | 
				
238,104 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
119,433 
				 | 
			 
			
				| 
					 
						Average interest rate during the period 
				 | 
				
					 
						  
				 | 
				
0.24% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
0.30% 
				 | 
			 
			
				| 
					 
						Average interest rate at end of period 
				 | 
				
					 
						  
				 | 
				
0.20% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
0.30% 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Other short-term borrowings: 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Federal funds purchased 
				 | 
				
					 
						$ 
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
31,500 
				 | 
			 
			
				| 
					 
						FHLB 
				 | 
				
					 
						$ 
				 | 
				
195,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
180,000 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
		  
		
			 
		 
		  
	   
 | 
      
      
        | Trust Preferred Capital Notes Qualify for Tier 1 Capital | 
        
 
		
			In connection with the acquisition of StellarOne, the Company acquired trust preferred capital notes totaling $32.0 million with a remaining fair value discount of $7.3 million at September 30, 2014.  The trust preferred capital notes currently qualify for Tier 1 capital of the Company for regulatory purposes.  
		 
		
			 
		 
		
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						Principal 
				 | 
				
					 
						  
				 | 
				
					 
						Investment(1) 
				 | 
				
					 
						  
				 | 
				
					 
						Spread to  3-Month LIBOR 
				 | 
				
					 
						  
				 | 
				
					 
						Rate 
				 | 
				
					 
						  
				 | 
				
					 
						Maturity 
				 | 
			 
			
				| 
					 
						Trust Preferred Capital Note - Statutory Trust I 
				 | 
				
					 
						$ 
				 | 
				
22,500,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
696,000 
				 | 
				
					 
						  
				 | 
				
2.75% 
				 | 
				
					 
						  
				 | 
				
2.99% 
				 | 
				
					 
						  
				 | 
				
					 
						6/17/2034 
				 | 
			 
			
				| 
					 
						Trust Preferred Capital Note - Statutory Trust II 
				 | 
				
					 
						  
				 | 
				
36,000,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
1,114,000 
				 | 
				
					 
						  
				 | 
				
1.40% 
				 | 
				
					 
						  
				 | 
				
1.64% 
				 | 
				
					 
						  
				 | 
				
					 
						6/15/2036 
				 | 
			 
			
				| 
					 
						VFG Limited Liability Trust I Indenture 
				 | 
				
					 
						  
				 | 
				
20,000,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
619,000 
				 | 
				
					 
						  
				 | 
				
2.73% 
				 | 
				
					 
						  
				 | 
				
2.97% 
				 | 
				
					 
						  
				 | 
				
					 
						3/18/2034 
				 | 
			 
			
				| 
					 
						FNB Statutory Trust II Indenture 
				 | 
				
					 
						  
				 | 
				
12,000,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
372,000 
				 | 
				
					 
						  
				 | 
				
3.10% 
				 | 
				
					 
						  
				 | 
				
3.34% 
				 | 
				
					 
						  
				 | 
				
					 
						6/26/2033 
				 | 
			 
			
				| 
					 
						Total 
				 | 
				
					 
						$ 
				 | 
				
90,500,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
2,801,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						(1) reported as 'Other Assets' within the Consolidated Balance Sheets 
				 | 
			 
		  
		
			 
		 
		  
	   
 | 
      
      
        | Advances from the FHLB | 
        
 
		
			In connection with the StellarOne acquisition, the Company assumed $70.0 million in long-term borrowings with the FHLB with a remaining fair value premium of $2.4 million at September 30, 2014.  As of September 30, 2014, the advances from the FHLB consisted of the following (dollars in thousands):
		 
		
			 
		 
		
			 
		 
		
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Long Term Type 
				 | 
				
					 
						  
				 | 
				
					 
						Spread to  3-Month LIBOR 
				 | 
				
					 
						  
				 | 
				
					 
						Interest Rate 
				 | 
				
					 
						  
				 | 
				
					 
						Maturity Date 
				 | 
				
					 
						  
				 | 
				
					 
						Advance Amount 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.44% 
				 | 
				
					 
						  
				 | 
				
					 
						0.68% 
				 | 
				
					 
						  
				 | 
				
					 
						8/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
55,000 
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.45% 
				 | 
				
					 
						  
				 | 
				
					 
						0.69% 
				 | 
				
					 
						  
				 | 
				
					 
						11/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
65,000 
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.45% 
				 | 
				
					 
						  
				 | 
				
					 
						0.69% 
				 | 
				
					 
						  
				 | 
				
					 
						11/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.45% 
				 | 
				
					 
						  
				 | 
				
					 
						0.69% 
				 | 
				
					 
						  
				 | 
				
					 
						11/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
			 
			
				| 
					 
						Fixed Rate 
				 | 
				
					 
						  
				 | 
				
					 
						- 
				 | 
				
					 
						  
				 | 
				
					 
						3.62% 
				 | 
				
					 
						  
				 | 
				
					 
						11/28/2017 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
			 
			
				| 
					 
						Fixed Rate 
				 | 
				
					 
						  
				 | 
				
					 
						- 
				 | 
				
					 
						  
				 | 
				
					 
						3.44% 
				 | 
				
					 
						  
				 | 
				
					 
						7/28/2015 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
			 
			
				| 
					 
						Fixed Rate 
				 | 
				
					 
						  
				 | 
				
					 
						- 
				 | 
				
					 
						  
				 | 
				
					 
						3.75% 
				 | 
				
					 
						  
				 | 
				
					 
						7/30/2018 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
5,000 
				 | 
			 
			
				| 
					 
						Fixed Rate 
				 | 
				
					 
						  
				 | 
				
					 
						- 
				 | 
				
					 
						  
				 | 
				
					 
						3.97% 
				 | 
				
					 
						  
				 | 
				
					 
						7/30/2018 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
5,000 
				 | 
			 
			
				| 
					 
						Fixed Rate Hybrid 
				 | 
				
					 
						  
				 | 
				
					 
						- 
				 | 
				
					 
						  
				 | 
				
					 
						2.11% 
				 | 
				
					 
						  
				 | 
				
					 
						10/5/2016 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
25,000 
				 | 
			 
			
				| 
					 
						Fixed Rate Hybrid 
				 | 
				
					 
						  
				 | 
				
					 
						- 
				 | 
				
					 
						  
				 | 
				
					 
						0.91% 
				 | 
				
					 
						  
				 | 
				
					 
						7/25/2016 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
15,000 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
210,000 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
		  
		
			As of December 31, 2013, the advances from the FHLB consisted of the following (dollars in thousands):
		 
		
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Long Term Type 
				 | 
				
					 
						  
				 | 
				
					 
						Spread to  3-Month LIBOR 
				 | 
				
					 
						  
				 | 
				
					 
						Interest Rate 
				 | 
				
					 
						  
				 | 
				
					 
						Maturity Date 
				 | 
				
					 
						  
				 | 
				
					 
						Advance Amount 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.44% 
				 | 
				
					 
						  
				 | 
				
					 
						0.69% 
				 | 
				
					 
						  
				 | 
				
					 
						8/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
55,000 
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.45% 
				 | 
				
					 
						  
				 | 
				
					 
						0.70% 
				 | 
				
					 
						  
				 | 
				
					 
						11/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
65,000 
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.45% 
				 | 
				
					 
						  
				 | 
				
					 
						0.70% 
				 | 
				
					 
						  
				 | 
				
					 
						11/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
			 
			
				| 
					 
						Adjustable Rate Credit 
				 | 
				
					 
						  
				 | 
				
					 
						0.45% 
				 | 
				
					 
						  
				 | 
				
					 
						0.70% 
				 | 
				
					 
						  
				 | 
				
					 
						11/23/2022 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
140,000 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
		  
		
			 
		 
		  
	   
 | 
      
      
        | Contractual Maturities of Long-Term Debt | 
        
 
		
			 
		 
		
			As of September 30, 2014, the contractual maturities of long-term debt are as follows for the years ending (dollars in thousands):
		 
		
			 
		 
		
			 
		 
		
			 
		 
		
			 
		 
		
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						Trust Preferred Capital Notes 
				 | 
				
					 
						  
				 | 
				
					 
						Subordinated Debt 
				 | 
				
					 
						  
				 | 
				
					 
						FHLB Advances 
				 | 
				
					 
						  
				 | 
				
					 
						Fair Value  Premium (Discount) 
				 | 
				
					 
						  
				 | 
				
					 
						Prepayment Penalty 
				 | 
				
					 
						  
				 | 
				
					 
						Total Long-term Borrowings 
				 | 
			 
			
				| 
					 
						Remaining three months in 2014 
				 | 
				
					 
						$ 
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
75 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
(455)
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
(380)
				 | 
			 
			
				| 
					 
						2015 
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
175 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(1,831)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
8,344 
				 | 
			 
			
				| 
					 
						2016 
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
17,500 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
40,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
271 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(1,882)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
55,889 
				 | 
			 
			
				| 
					 
						2017 
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
170 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(1,923)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
8,247 
				 | 
			 
			
				| 
					 
						2018 
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
10,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(143)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(1,970)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
7,887 
				 | 
			 
			
				| 
					 
						2019 
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(286)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(2,018)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(2,304)
				 | 
			 
			
				| 
					 
						Thereafter 
				 | 
				
					 
						  
				 | 
				
93,301 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
140,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(5,923)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
(5,899)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
221,479 
				 | 
			 
			
				| 
					 
						Total long-term borrowings 
				 | 
				
					 
						$ 
				 | 
				
93,301 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
17,500 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
210,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
(5,661)
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
(15,978)
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
299,162 
				 | 
			 
		  
		
			 
		 
		  
	   
 |