Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Narrative) (Detail)

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Intangible Assets (Narrative) (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization of intangible assets $ 15,445 $ 9,360
Estimated useful life 9 years 9 months 28 days