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New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
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Dec. 31, 2016 | Jan. 01, 2018
ASU 2016-15 |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Reclassification of cash payments recorded in loss on debt amendments and refinancing from operating activities to financing activities | $ 9,519 |
Maximum | Subsequent Event |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Cumulative effect of accounting change adjustment in retained earnings |  | $ 55,000

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