XML 51 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1
ACQUISITION OF WASHINGTONFIRST BANKSHARES INC (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2018
USD ($)
Jun. 30, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
Number_Of_Offices
Jan. 01, 2018
USD ($)
Dec. 29, 2017
$ / shares
Business Acquisition [Line Items]          
Transaction value, business combination $ 446,650        
Share Price | $ / shares         $ 39.02
Number of shares issued by the company, pursuant to WashingtonFirst acquisition | shares   11,446,197      
Assets acquired     $ 2,100,000 $ 2,097,766  
Increase in goodwill from re-measurement period adjustment   $ 3,400      
Provisional amount of goodwill recognized       $ 260,544  
WashingtonFirst Bankshares Inc [Member]          
Business Acquisition [Line Items]          
Number of Banking Offices | Number_Of_Offices     19    
The combined company (Sandy Spring And WF) [Member] | Sandy Spring Shareholders [Member]          
Business Acquisition [Line Items]          
Percentage of voting interests acquired, combined co.       67.70%  
The combined company (Sandy Spring And WF) [Member] | WashingtonFirst Shareholders [Member]          
Business Acquisition [Line Items]          
Percentage of voting interests acquired, combined co.       32.30%