Accrued Expenses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 10, 2015
Other Accrued Liabilities [Line Items]
Accrued claim settlement	$ 23,500		$ 23,500	$ 23,500	$ 23,500
Proceeds from insurance settlement		$ 29,600	29,600
Voluntary Resignation Program [Member]
Other Accrued Liabilities [Line Items]
Unpaid other termination benefits under the voluntary resignation program, current	3,500		$ 3,500
Aggregate other termination benefits expense under the voluntary resignation program	$ 4,200