XML 73 R59.htm IDEA: XBRL DOCUMENT v3.3.1.900
Acquisitions and Divestitures - Additional Information (Detail)
 12 Months Ended
Oct. 31, 2015
USD ($)
Business
Dec. 12, 2014
USD ($)
Branch
Oct. 24, 2014
USD ($)
Branch
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Business Acquisition [Line Items]              
Net gain on branch divestiture         $ 755,000    
Allocation of goodwill       $ 100,486,000 100,722,000 $ 105,455,000 $ 104,866,000
Proceeds from sale of business       (231,000) (131,230,000)    
Insurance Services              
Business Acquisition [Line Items]              
Net gain on branch divestiture $ (8,000)            
Number of insurance agencies sold | Business 1            
Proceeds from sale of business $ 372,000            
Goodwill write down       324,000      
Intangible assets write down       61,000      
Purchase price           385,000  
Cash consideration           150,000  
Additional cash consideration           235,000  
Earn-out payments related to acquisitions       $ 88,000 $ 353,000 $ 442,000  
CresCom Bank              
Business Acquisition [Line Items]              
Number of operating branches sold | Branch   13          
Deposit assumed by the buyer   $ 215,190,000          
Loan assumed by the buyer   70,040,000          
Net gain on branch divestiture   755,000          
Deposit premium received   6,450,000          
Allocation of goodwill   $ 6,450,000          
Southeastern, Coastal region of North Carolina | CresCom Bank              
Business Acquisition [Line Items]              
Number of operating branches sold | Branch   10          
South Carolina | CresCom Bank              
Business Acquisition [Line Items]              
Number of operating branches sold | Branch   3          
Bank of America              
Business Acquisition [Line Items]              
Number of operating branches | Branch     7        
Deposit held on acquisition date by acquiree     $ 318,880,000        
Premium on deposits acquired     5,790,000        
Loans recognized     $ 0        
Bank of America | Southwestern Virginia              
Business Acquisition [Line Items]              
Number of operating branches | Branch     6        
Bank of America | Central North Carolina              
Business Acquisition [Line Items]              
Number of operating branches | Branch     1