XML 96 R85.htm IDEA: XBRL DOCUMENT v3.10.0.1
Subsequent events Subsequent events (Details) - USD ($)
6 Months Ended
Jul. 01, 2018
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Subsequent Event [Line Items]        
Assets   $ 7,462,156,000 $ 7,537,620,000 $ 7,832,092,000
Deposits   6,015,844,000 $ 5,817,326,000  
Business Combination, Acquisition Related Costs   500,000    
NewDominion [Member]        
Subsequent Event [Line Items]        
Assets   329,000,000    
Loans Receivable, Net   278,000,000    
Deposits   $ 284,000,000    
NewDominion [Member] | Subsequent Event [Member]        
Subsequent Event [Line Items]        
Business Combination, Consideration Transferred $ 79,000,000      
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable 435,457      
Payments to Acquire Businesses, Gross $ 31,000,000