Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Summary of Intangible Assets (Detail)

v3.7.0.1
Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cost, beginning balance $ 25,027 $ 19,223  
Acquisition of certain assets of Jamison   5,804  
Cost, ending balance 25,027 25,027 $ 19,223
Accumulated amortization, beginning balance (9,696) (8,056)  
Amortization expense (1,927) (1,640) (1,422)
Accumulated amortization, ending balance (11,623) (9,696) (8,056)
Net book value $ 13,404 15,331  
Minimum      
Useful lives 3 years    
Maximum      
Useful lives 20 years    
Customer Relationships      
Cost, beginning balance $ 22,560 17,560  
Acquisition of certain assets of Jamison   5,000  
Cost, ending balance 22,560 22,560 17,560
Accumulated amortization, beginning balance (8,062) (6,627)  
Amortization expense (1,659) (1,435)  
Accumulated amortization, ending balance (9,721) (8,062) (6,627)
Net book value $ 12,839 $ 14,498  
Customer Relationships | Minimum      
Useful lives 10 years 10 years  
Customer Relationships | Maximum      
Useful lives 20 years 20 years  
Other Intangible Assets      
Cost, beginning balance $ 2,467 $ 1,663  
Acquisition of certain assets of Jamison   804  
Cost, ending balance 2,467 2,467 1,663
Accumulated amortization, beginning balance (1,634) (1,429)  
Amortization expense (268) (205)  
Accumulated amortization, ending balance (1,902) (1,634) $ (1,429)
Net book value $ 565 $ 833  
Other Intangible Assets | Minimum      
Useful lives 3 years 3 years  
Other Intangible Assets | Maximum      
Useful lives 5 years 5 years