Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Narrative) (Detail)

v3.6.0.2
Intangible Assets (Narrative) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of intangible assets $ 20,703 $ 20,650 $ 14,056
Estimated useful life 9 years 9 months 29 days