Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Goodwill And Intangible Assets [Line Items]
Amortization expense	$ 2,100	$ 2,100	$ 4,262	$ 4,300
Estimated Amortization Expense for Intangible Assets [Member]
Goodwill And Intangible Assets [Line Items]
Remainder 2016	4,000		4,000
Year 2017	8,300		8,300
Year 2018	8,300		8,300
Year 2019	8,300		8,300
Year 2020	8,300		8,300
Thereafter	$ 15,900		$ 15,900