Revenue Recognition - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
Disaggregation Of Revenue [Line Items]
Effect on revenue	$ 425,400	$ 442,700	$ 436,000	$ 406,100	$ 366,100	$ 384,800	$ 378,000	$ 346,600	$ 1,710,200	$ 1,475,500	$ 1,416,200
Effect on cost of goods sold									1,375,100	1,153,400	$ 1,126,200
Accounting Standards Update 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Cumulative increase to opening balance of retained earnings					300					300
Impact of restatement on revenue not previously recognized					5,300					5,300
Impact of restatement on cost of goods sold not previously recognized					$ 5,000					$ 5,000
Effect on revenue									3,100
Effect on cost of goods sold									2,900
Accounting Standards Update 2014-09 [Member] | Accounts Receivable
Disaggregation Of Revenue [Line Items]
Contract assets	$ 10,500								$ 10,500			$ 5,300