Prior Periods Financial Statement Revision - Schedule of Revision on Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Changes And Error Corrections [Line Items]
Current deferred tax assets					$ 10,403
Total current assets	$ 327,628		$ 280,555		283,888
Property, plant and equipment, net	333,160		322,953		318,639
Goodwill, net	452,282		450,311		454,970
Investment in joint venture	39,853	$ 37,999	36,008		36,250
Total assets	1,405,816	1,386,655	1,355,700	$ 1,394,733	1,386,805
Accrued salaries, wages and benefits	23,941		24,996		20,825
Income taxes payable			2,125		5,394
Total current liabilities	147,063		138,616		133,095
Non-current deferred tax liabilities	99,333		99,591		125,635
Other liabilities	9,647		9,651		4,924
Total liabilities	1,094,003		1,045,187		1,074,784
Additional paid-in capital	288,903		284,508		277,917
Retained earnings	38,167		55,509		55,794
Accumulated other comprehensive income (loss)	(15,564)	(24,804)	(29,808)		(21,992)	$ 4,657
Total stockholders' equity	311,813	323,491	310,513		312,020	172,989
Total liabilities and stockholders' equity	$ 1,405,816	1,386,655	1,355,700		1,386,805
As Previously Reported [Member]
Accounting Changes And Error Corrections [Line Items]
Current deferred tax assets					6,696
Total current assets					280,181
Property, plant and equipment, net					318,968
Goodwill, net					449,898
Investment in joint venture		42,387	40,694		38,462
Total assets		1,391,043	1,360,386		1,380,567
Accrued salaries, wages and benefits					21,125
Income taxes payable					5,350
Total current liabilities					133,351
Non-current deferred tax liabilities					117,459
Other liabilities					4,746
Total liabilities					1,066,686
Additional paid-in capital					277,582
Retained earnings					55,151
Accumulated other comprehensive income (loss)		(20,416)	(25,122)		(19,153)	5,367
Total stockholders' equity		327,879	315,199		313,881	173,699
Total liabilities and stockholders' equity		1,391,043	1,360,386		1,380,567
Adjustment [Member]
Accounting Changes And Error Corrections [Line Items]
Current deferred tax assets					3,707
Total current assets					3,707
Property, plant and equipment, net					(329)
Goodwill, net					5,072
Investment in joint venture		(4,388)	(4,686)		(2,212)
Total assets		(4,388)	(4,686)		6,238
Accrued salaries, wages and benefits					(300)
Income taxes payable					44
Total current liabilities					(256)
Non-current deferred tax liabilities					8,176
Other liabilities					178
Total liabilities					8,098
Additional paid-in capital					335
Retained earnings					643
Accumulated other comprehensive income (loss)		(4,388)	(4,686)		(2,839)	(710)
Total stockholders' equity		(4,388)	(4,686)		(1,861)	$ (710)
Total liabilities and stockholders' equity		$ (4,388)	$ (4,686)		$ 6,238