Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
ACCOUNTING POLICIES - The Company and Business Combinations and Divestitures Narrative (Details)
$ in Thousands
 9 Months Ended
Feb. 01, 2019
USD ($)
shares
Sep. 30, 2019
USD ($)
item
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]        
Date when former legal or registered name was changed   May 17, 2019    
Number of bank branches (branch) | item   149    
Number of ATMs (ATM) | item   170    
Cash paid in acquisition   $ 12 $ 14,284  
Goodwill   $ 929,815   $ 727,168
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 202,631      
Acquired amortizable intangible assets $ 43,500      
Minimum | Access National Bank        
Business Acquisition [Line Items]        
Intangible assets, amortization period (years) 5 years      
Maximum | Access National Bank        
Business Acquisition [Line Items]        
Intangible assets, amortization period (years) 10 years