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Revenue Recognition - Summary of Impact of Adopting Topic 606 on Condensed Consolidated Statements of Operations and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue from Contract with Customers [Line Items]
Net revenue	$ 348,999	$ 295,193	$ 983,311	$ 833,058
Cost of sales	251,665	209,612	710,358	590,377
Income before income taxes	20,921	17,731	51,034	45,849
Income tax provision	5,358	5,721	12,762	15,502
Net income	15,563	$ 12,010	38,272	$ 30,347
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue from Contract with Customers [Line Items]
Net revenue	60		(2,612)
Cost of sales	(207)		(1,781)
Income before income taxes	267		(831)
Income tax provision	68		(208)
Net income	199		(623)
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue from Contract with Customers [Line Items]
Net revenue	349,059		980,699
Cost of sales	251,458		708,577
Income before income taxes	21,188		50,203
Income tax provision	5,426		12,554
Net income	$ 15,762		$ 37,649

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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