Quarterly report pursuant to Section 13 or 15(d)

Goodwill - Summary of Changes to Carrying Amount of Goodwill (Detail)

v3.5.0.2
Goodwill - Summary of Changes to Carrying Amount of Goodwill (Detail) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Goodwill [Line Items]    
Beginning, Gross balance $ 42,097 $ 37,423
Beginning, Accumulated impairment losses (17,415) (17,415)
Beginning, Net balance 24,682 20,008
Ending, Gross balance 42,583 42,097
Ending, Accumulated impairment losses (17,415) (17,415)
Ending, Net balance 25,168 24,682
Jamison    
Goodwill [Line Items]    
Goodwill, Acquisition   $ 4,674
Ending, Net balance 4,674  
Cappiccille    
Goodwill [Line Items]    
Goodwill, Acquisition $ 486