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Interim Financial Statements - Additional Information (Detail) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Apr. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) Facility | Sep. 30, 2017 USD ($)
Interim Reporting [Line Items] |  |  |  |  |
Number of manufacturing facilities | Facility |  |  |  | 51 |
Net profit change on contracts (less than) |  | $ (13,784) | $ 125,961 | $ (44,277) | $ 112,234
Cash paid for debt prepayment | $ 31,600 |  |  |  |
Right-of-use asset and lease liability to exceed |  |  |  | 50,000 |
Maximum | Accounting Standards Update 2014-09 |  |  |  |  |
Interim Reporting [Line Items] |  |  |  |  |
Net profit change on contracts (less than) |  |  |  | $ 100 |

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- Definition Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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