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JUNIOR SUBORDINATED DEBT AND SENIOR SUBORDINATED NOTES (Narrative) (Details)
$ in Thousands
9 Months Ended
Jan. 20, 2017
USD ($)
Apr. 22, 2015
USD ($)
Sep. 17, 2003
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2017
Jun. 23, 2017
USD ($)
Senior Subordinated Notes [Member]            
Debt Instrument [Line Items]            
Proceeds from subordinated notes $ 27,000          
Interest rate percentage 5.875%          
Basis spread on LIBOR 3.95%          
Unamortized debt issuance costs       $ 784    
Eastern Virginia Bankshares Inc [Member]            
Debt Instrument [Line Items]            
Notes assumed in merger     $ 10,300      
Junior subordinated debt           $ 9,509
Senior subordinated notes           21,051
Pooled underwriting amount     $ 650,000      
Eastern Virginia Bankshares Inc [Member] | Junior Subordinated Debt [Member]            
Debt Instrument [Line Items]            
Interest rate percentage       5.28% 4.55%  
Description of variable rate basis       three-month LIBOR    
Basis spread on LIBOR     2.95%      
Percentage of tier one capital for regulatory capital adequacy       25.00%    
Eastern Virginia Bankshares Inc [Member] | Senior Subordinated Notes [Member]            
Debt Instrument [Line Items]            
Proceeds from subordinated notes   $ 20,000        
Interest rate percentage   6.50%        
Percentage of aggregate principle amount   100.00%        
Debt instrument basis points spread   5.02        
Scenario, Adjustment [Member] | Eastern Virginia Bankshares Inc [Member]            
Debt Instrument [Line Items]            
Junior subordinated debt           (801)
Senior subordinated notes           $ 1,876