Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill And Intangible Assets [Line Items]
Impairment of intangible assets	$ 6,600	$ 6,568
Amortization expense		$ 8,294	$ 8,562	$ 9,019
Weighted average estimated useful life of intangible assets		11 years
Estimated Amortization Expense for Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Year 2017	9,100	$ 9,100
Year 2018	9,100	9,100
Year 2019	9,100	9,100
Year 2020	9,100	9,100
Year 2021	9,100	9,100
Thereafter	$ 58,900	$ 58,900
Minimum [Member]
Goodwill And Intangible Assets [Line Items]
Useful lives of intangible assets		8 years
Maximum [Member]
Goodwill And Intangible Assets [Line Items]
Useful lives of intangible assets		17 years