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Discontinued Operations - Summary of Major Line Items Included in Results of Operations of Discontinued Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Income from discontinued operations, net of tax $ (2,507) $ 129,441 $ 5,236 $ 5,518 $ 0 $ 137,688 $ 16,153
PBC Business | Discontinued Operations, Disposed of by Sale              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Net sales           168,287 248,534
Cost of products sold (exclusive of depreciation and amortization shown separately below)           130,555 192,994
Selling, general and administrative expense           11,818 16,992
Depreciation and amortization           7,722 11,852
Loss on disposal of assets           0 27
Restructuring and integration expense           429 4,366
Income from operations           17,763 22,303
Interest expense           (181) (284)
Other income (expense), net           (84) 503
Income from discontinued operations before gain on disposal and provision for income taxes           17,498 22,522
Provision for income taxes on discontinued operations           (7,461) (6,369)
Income from discontinued operations before gain on disposal           10,037 16,153
Gain on disposal of discontinued operations           213,503 0
Provision for income taxes on gain on disposal           (85,852) 0
Income from discontinued operations, net of tax           $ 137,688 $ 16,153