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Revenue Recognition - Schedule of Changes in Contract Balances Due to Adoption of New Accounting Standards (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Revenue From Contract With Customer Balances Of Net Contract Assets Liabilities [Line Items] |  |
Contract assets | $ 126,688 | $ 123,197
Contract liabilities | (33,494) | (38,571)
Net contract assets (liabilities) | 93,194 |
ASU 2014-09 | As Reported |  |
Revenue From Contract With Customer Balances Of Net Contract Assets Liabilities [Line Items] |  |
Contract assets | 126,688 | 123,197
Contract liabilities | (33,494) | (38,571)
Net contract assets (liabilities) |  | $ 84,626
ASU 2014-09 | Change |  |
Revenue From Contract With Customer Balances Of Net Contract Assets Liabilities [Line Items] |  |
Contract assets | 3,491 |
Contract liabilities | 5,077 |
Net contract assets (liabilities) | $ 8,568 |

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