XML 41 R28.htm IDEA: XBRL DOCUMENT v3.7.0.1
Goodwill and Intangible Assets - Narrative (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Goodwill $ 75,110   $ 75,110
Amortization expense $ 500 $ 600