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 ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Investment $ 377,587,000 $ 250,210,000
Trust Preferred Capital Notes    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance 150,500,000  
Investment 4,659,000  
Statutory Trust I    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance 22,500,000  
Investment $ 696,000  
Rate 4.66%  
Subordinated debt maturity date Jun. 17, 2034  
Statutory Trust I | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 2.75%  
Statutory Trust II    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 36,000,000  
Investment $ 1,114,000  
Rate 3.31%  
Subordinated debt maturity date Jun. 15, 2036  
Statutory Trust II | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 1.40%  
VFG Limited Liability Trust I Indenture    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 20,000,000  
Investment $ 619,000  
Rate 4.64%  
Subordinated debt maturity date Mar. 18, 2034  
VFG Limited Liability Trust I Indenture | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 2.73%  
FNB Statutory Trust II Indenture    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 12,000,000  
Investment $ 372,000  
Rate 5.01%  
Subordinated debt maturity date Jun. 26, 2033  
FNB Statutory Trust II Indenture | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 3.10%  
Gateway Capital Statutory Trust I    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 8,000,000  
Investment $ 248,000  
Rate 5.01%  
Subordinated debt maturity date Sep. 17, 2033  
Gateway Capital Statutory Trust I | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 3.10%  
Gateway Capital Statutory Trust II    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 7,000,000  
Investment $ 217,000  
Rate 4.56%  
Subordinated debt maturity date Jun. 17, 2034  
Gateway Capital Statutory Trust II | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 2.65%  
Gateway Capital Statutory Trust III    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 15,000,000  
Investment $ 464,000  
Rate 3.41%  
Subordinated debt maturity date May 30, 2036  
Gateway Capital Statutory Trust III | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 1.50%  
Gateway Capital Statutory Trust IV    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 25,000,000  
Investment $ 774,000  
Rate 3.46%  
Subordinated debt maturity date Jul. 30, 2037  
Gateway Capital Statutory Trust IV | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 1.55%  
MFC Capital Trust II    
Debt Instrument [Line Items]    
Trust preferred capital notes principal balance $ 5,000,000  
Investment $ 155,000  
Rate 4.76%  
Subordinated debt maturity date Jan. 23, 2034  
MFC Capital Trust II | LIBOR    
Debt Instrument [Line Items]    
Spread on LIBOR 2.85%