Discontinued Operations - Summary of Major Line Items Included in Results of Operations of Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net sales		$ 67,928		$ 136,687
Cost of sales (exclusive of depreciation and amortization shown separately below)		51,526		104,485
Selling, general and administrative expense		4,768		9,121
Depreciation and amortization		3,102		6,111
Restructuring and integration expense		300		429
Income from operations		8,232		16,541
Interest expense (income)		71		188
Other expense (income), net		20		18
Income from discontinued operations before provision (benefit) for income taxes		8,141		16,335
Provision for income taxes		2,905		5,581
Income from discontinued operations, net of tax	$ 0	$ 5,236	$ 0	$ 10,754