Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS (Narrative) (Details)

v3.19.2
BORROWINGS (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Feb. 01, 2019
Aug. 23, 2012
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2016
Subordinated Borrowing [Line Items]                  
Remaining available balance for the federal funds lines     $ 557,000,000.0   $ 557,000,000.0   $ 382,000,000.0    
Remaining available balance of alternate line of credit     25,000,000.0   25,000,000.0   25,000,000.0    
Maximum collateral dependent line of credit with the FHLB     5,100,000,000   5,100,000,000   4,000,000,000.0    
Subordinated debt     158,500,000   158,500,000       $ 150,000,000.0
Prepayment penalty   $ 19,600,000              
Prepayment penalty amortization expense     501,562 $ 490,000 994,000 $ 971,000      
Trust Preferred Capital Notes                  
Subordinated Borrowing [Line Items]                  
Trust preferred capital notes principal balance         150,500,000        
Remaining fair value discount on acquired notes     15,300,000   15,300,000        
Subordinated Debt                  
Subordinated Borrowing [Line Items]                  
Remaining fair value discount on acquired notes     1,500,000   $ 1,500,000   $ 1,600,000    
Fixed interest rate on debt instrument                 5.00%
Maturity Date         Dec. 15, 2026        
Subordinated Debt | LIBOR                  
Subordinated Borrowing [Line Items]                  
Spread on LIBOR         3.175%        
Acquisitions, Prior To 2006                  
Subordinated Borrowing [Line Items]                  
Trust preferred capital notes principal balance         $ 58,500,000        
Stellarone and Xenith | Trust Preferred Capital Notes                  
Subordinated Borrowing [Line Items]                  
Trust preferred capital notes principal balance         87,000,000.0        
Access National Bank                  
Subordinated Borrowing [Line Items]                  
Trust preferred capital notes principal balance $ 5,000,000.0                
Xenith                  
Subordinated Borrowing [Line Items]                  
Subordinated debt               $ 8,500,000  
Xenith | Subordinated Debt                  
Subordinated Borrowing [Line Items]                  
Remaining fair value discount on acquired notes     $ 103,000   $ 103,000     $ 259,000  
Fixed interest rate on debt instrument               6.75%