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v3.8.0.1

Prior Periods Financial Statement Revision - Schedule of Revision on Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands | Sep. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | --- | ---
Accounting Changes And Error Corrections [Line Items] |  |  |  |  |  |
Total current assets | $ 552,435 |  | $ 281,427 | [1] |  |
Property, plant and equipment, net | 238,809 |  | 230,580 | [1] |  |
Goodwill, net | 443,496 |  | 441,402 | [1] |  |
Investment in joint venture | 37,739 |  | 36,008 | [1] |  |
Total assets | 1,517,510 |  | 1,356,572 | [1] |  |
Accrued salaries, wages and benefits | 17,362 |  | 15,762 | [1] |  |
Income taxes payable | 65,989 |  |  |  |  |
Total current liabilities | 175,004 |  | 139,488 | [1] |  |
Non-current deferred tax liabilities | 96,316 |  | 96,069 | [1] |  |
Other liabilities | 10,887 |  | 12,829 | [1] |  |
Total liabilities | 1,076,206 |  | 1,046,059 | [1] |  |
Additional paid-in capital |  |  |  |  | $ 277,917 |
Accumulated other comprehensive income (loss) |  | $ (24,804) | (29,808) |  | (21,992) | $ 4,657
Total stockholders' equity | 441,304 | 323,491 | 310,513 | [1],[2] | 312,020 | 172,989
Total liabilities and stockholders' equity | $ 1,517,510 |  | 1,356,572 | [1] |  |
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 |
As Revised [Member] |  |  |  |  |  |
Accounting Changes And Error Corrections [Line Items] |  |  |  |  |  |
Current deferred tax assets |  |  |  |  | 10,403 |
Total current assets |  |  |  |  | 283,888 |
Property, plant and equipment, net |  |  |  |  | 318,639 |
Goodwill, net |  |  |  |  | 454,970 |
Investment in joint venture |  | 37,999 | 36,008 |  | 36,250 |
Total assets |  | 1,386,655 | 1,355,700 |  | 1,386,805 |
Accrued salaries, wages and benefits |  |  |  |  | 20,825 |
Income taxes payable |  |  |  |  | 5,394 |
Total current liabilities |  |  |  |  | 133,095 |
Non-current deferred tax liabilities |  |  |  |  | 125,635 |
Other liabilities |  |  |  |  | 4,924 |
Total liabilities |  |  |  |  | 1,074,784 |
Additional paid-in capital |  |  |  |  | 277,917 |
Retained earnings |  |  |  |  | 55,794 |
Accumulated other comprehensive income (loss) |  | (24,804) | (29,808) |  | (21,992) |
Total stockholders' equity |  | 323,491 | 310,513 |  | 312,020 |
Total liabilities and stockholders' equity |  | $ 1,386,655 | $ 1,355,700 |  | $ 1,386,805 |
[1] | Includes the effects of discontinued operations (Note 2) and prior periods' revisions (Note 1 and Note 15)
[2] | Includes the effects of prior periods' revisions (Note 1 and Note 15)

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