Annual report pursuant to Section 13 and 15(d)

BORROWINGS (Trust Preferred Capital Notes Qualify for Tier 1 Capital) (Details)

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BORROWINGS (Trust Preferred Capital Notes Qualify for Tier 1 Capital) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Trust preferred capital notes qualify for Tier 1 capital    
Investment $ 99,854 $ 101,907
Statutory Trust    
Trust preferred capital notes qualify for Tier 1 capital    
Trust preferred capital notes principal balance 22,500  
Investment $ 696  
Rate 4.44%  
Maturity Date Jun. 17, 2034  
Statutory Trust II    
Trust preferred capital notes qualify for Tier 1 capital    
Trust preferred capital notes principal balance $ 36,000  
Investment $ 1,114  
Rate 3.09%  
Maturity Date Jun. 15, 2036  
VFG Limited Liability Trust I Indenture    
Trust preferred capital notes qualify for Tier 1 capital    
Trust preferred capital notes principal balance $ 20,000  
Investment $ 619  
Rate 4.42%  
Maturity Date Mar. 18, 2034  
FNB Statutory Trust II Indenture    
Trust preferred capital notes qualify for Tier 1 capital    
Trust preferred capital notes principal balance $ 12,000  
Investment $ 372  
Rate 4.79%  
Maturity Date Jun. 26, 2033  
Trust Preferred Capital Notes    
Trust preferred capital notes qualify for Tier 1 capital    
Trust preferred capital notes principal balance $ 90,500  
Investment $ 2,801  
LIBOR | Statutory Trust    
Trust preferred capital notes qualify for Tier 1 capital    
Spread on LIBOR 2.75%  
LIBOR | Statutory Trust II    
Trust preferred capital notes qualify for Tier 1 capital    
Spread on LIBOR 1.40%  
LIBOR | VFG Limited Liability Trust I Indenture    
Trust preferred capital notes qualify for Tier 1 capital    
Spread on LIBOR 2.73%  
LIBOR | FNB Statutory Trust II Indenture    
Trust preferred capital notes qualify for Tier 1 capital    
Spread on LIBOR 3.10%