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Summary of Significant Accounting Policies - Schedule of Cumulative Effect of Changes made to Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Other receivables | $ 35,124 |  | $ 26,578
Deferred tax assets, net | 21,427 |  | 23,428
Retained earnings | 909,611 |  | $ 922,178
ASU 2014-09 [member] |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Other receivables |  | $ 26,952 |
Deferred tax assets, net |  | 23,332 |
Retained earnings |  | 922,456 |
ASU 2014-09 [member] | Adjustments Due to ASU 2014-09 [Member] |  |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |  |
Other receivables | 64 | 374 |
Deferred tax assets, net |  | (96) |
Retained earnings | $ 175 | $ 278 |

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