Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS (Narrative) (Details)

v3.4.0.3
BORROWINGS (Narrative) (Details)
 3 Months Ended
Aug. 23, 2012
USD ($)
Mar. 31, 2016
USD ($)
item
Mar. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Jan. 01, 2014
USD ($)
Subordinated Borrowing [Line Items]          
Remaining available balance for the federal funds lines   $ 172,000,000   $ 175,000,000  
Maximum collateral dependent line of credit with the FHLB   1,500,000,000   1,500,000,000  
Prepayment penalty $ 19,600,000        
Prepayment penalty amortization expense   463,000 $ 447,000    
Carrying value of the loans and securities pledged as collateral for FHLB   1,900,000,000   $ 1,900,000,000  
Trust Preferred Capital Notes [Member]          
Subordinated Borrowing [Line Items]          
Trust preferred capital notes principal balance [1]   $ 90,500,000      
Acquisitions, Prior To 2006 [Member]          
Subordinated Borrowing [Line Items]          
Number of bank acquisitions | item   2      
Trust preferred capital notes principal balance   $ 58,500,000      
Acquisitions, Prior To 2006 [Member] | Subordinated Debt [Member]          
Subordinated Borrowing [Line Items]          
Subordinated debt interest rate basis   LIBOR plus 1.45%      
Remaining fair value discount on acquired notes   $ 41,000      
Subordinated debt maturity date   Apr. 01, 2016      
Subordinated debt   $ 17,500,000      
LIBOR [Member] | Acquisitions, Prior To 2006 [Member]          
Subordinated Borrowing [Line Items]          
Three-month LIBOR rate plus   1.45%      
StellarOne Bank [Member]          
Subordinated Borrowing [Line Items]          
Remaining fair value premium on acquired FHLB advances   $ 1,100,000      
Loans from other Federal Home Loan Banks   60,000,000     $ 70,000,000
StellarOne Bank [Member] | Trust Preferred Capital Notes [Member]          
Subordinated Borrowing [Line Items]          
Trust preferred capital notes principal balance   32,000,000      
Remaining fair value discount on acquired notes   $ 6,900,000      
[1] The total of the trust preferred capital securities and investments in the respective trusts represents the principal asset of the Company's junior subordinated debt securities with like maturities and like interest rates to the capital securities. The Company's investment in the trusts is reported in "Other Assets" within the Consolidated Balance Sheets.