Quarterly report pursuant to Section 13 or 15(d)

ACCOUNTING POLICIES - The Company and Business Combinations and Divestitures Narrative (Details)

v3.19.1
ACCOUNTING POLICIES - The Company and Business Combinations and Divestitures Narrative (Details)
$ in Thousands
 3 Months Ended
Feb. 01, 2019
USD ($)
shares
Mar. 31, 2019
USD ($)
ATM
branch
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]        
Number of bank branches (branch) | branch   155    
Number of ATM's (ATM) | ATM   200    
Cash paid in acquisition   $ 12 $ 6,170  
Goodwill   $ 927,760   $ 727,168
Access National Bank        
Business Acquisition [Line Items]        
Number of bank branches (branch) | branch   15    
Xenith        
Business Acquisition [Line Items]        
Number of bank branches (branch) | branch   7    
Access National Bank        
Business Acquisition [Line Items]        
Fair value of total consideration transferred $ 499,986      
Number of shares equivalent to each share of acquired entity (shares) | shares 0.75      
Number of common shares issued (shares) | shares 15,842,026      
Cash paid in acquisition $ 12      
Goodwill 200,576      
Acquired amortizable intangible assets $ 44,200      
Maximum | Access National Bank        
Business Acquisition [Line Items]        
Intangible assets, amortization period (years) 10 years