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Prior Periods Financial Statement Revision - Schedule of Revision on Condensed Consolidated Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016 | Mar. 31, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Accounting Changes And Error Corrections [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ 132,895 | $ 7,407 | $ 4,455 | [1] | $ (1,358) | $ 118,561 | $ 5,215 | [1] | $ 7,299 | $ (6,788) | $ 8,217
Change in fair value of interest rate hedge |  |  | 2,244 | [1] | (635) |  | 2,025 | [1] | 1,910 | (1,637) | (273)
Foreign currency translation gain (loss) | 6,083 | 5,004 | (378) | [1] | 7,223 | 20,327 | 1,774 | [1] | (9,727) | (25,011) | (18,599)
Other comprehensive income (loss) | (3,160) | 5,004 | 1,866 | [1] | 6,588 | 11,084 | 3,799 | [1] | (7,817) | (26,648) | (18,872)
Comprehensive income (loss) | $ 129,735 | 12,411 | 6,321 | [1] | 5,230 | $ 129,645 | 9,014 | [1] | (518) | (33,436) | (10,655)
As Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Changes And Error Corrections [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | 7,407 | 4,147 |  | (1,299) |  | 4,879 |  | 7,942 | (7,431) | 8,217
Change in fair value of interest rate hedge |  |  | 4,211 |  | (1,002) |  | 3,130 |  | 3,015 | (2,584) | (431)
Foreign currency translation gain (loss) |  | 4,706 | 382 |  | 6,719 |  | 4,176 |  | (8,984) | (21,936) | (17,731)
Other comprehensive income (loss) |  | 4,706 | 4,593 |  | 5,717 |  | 7,306 |  | (5,969) | (24,520) | (18,162)
Comprehensive income (loss) |  | 12,113 | 8,740 |  | 4,418 |  | 12,185 |  | 1,973 | (31,951) | (9,945)
Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Changes And Error Corrections [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  | 308 |  | (59) |  | 336 |  | (643) | 643 |
Change in fair value of interest rate hedge |  |  | (1,967) |  | 367 |  | (1,105) |  | (1,105) | 947 | 158
Foreign currency translation gain (loss) |  | 298 | (760) |  | 504 |  | (2,402) |  | (743) | (3,075) | (868)
Other comprehensive income (loss) |  | 298 | (2,727) |  | 871 |  | (3,507) |  | (1,848) | (2,128) | (710)
Comprehensive income (loss) |  | $ 298 | $ (2,419) |  | $ 812 |  | $ (3,171) |  | $ (2,491) | $ (1,485) | $ (710)
[1] | Includes the effects of discontinued operations (Note 2) and prior periods' revisions (Note 1 and Note 15)

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e557-108580 + Details
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