Discontinued Operations - Summary of Major Line Items Included in Results of Operations of Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016		Sep. 30, 2017	Sep. 30, 2016
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net sales	$ 31,600	$ 58,247		$ 168,287	$ 188,149
Cost of products sold (exclusive of depreciation and amortization shown separately below)	26,070	45,353		130,554	145,426
Selling, general and administrative expense	2,466	4,146		11,589	13,211
Depreciation and amortization	1,611	2,956		7,723	8,766
Restructuring and integration expense		50		427	2,390
Income from operations	1,453	5,742		17,994	18,356
Gain on disposal of discontinued operations	215,280			215,280
Other income (expense)	(59)	(98)		(265)	(325)
Income (loss) from discontinued operations before provision (benefit) for income taxes	216,674	5,644		233,009	18,031
Provision for income taxes	(80,849)	(1,981)		(86,430)	(5,467)
Income (loss) from discontinued operations, net of tax	$ 135,825	$ 3,663	[1]	$ 146,579	$ 12,564	[1]

[1] Includes the effects of discontinued operations (Note 2) and prior periods' revisions (Note 1 and Note 15)