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Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Provisions for loss contracts $ 86,100   $ 94,000
Deferred pre-production costs 17,900   $ 20,200
Net income (loss) attributable to noncontrolling interest (909) $ (1,885)  
Selling, general and administrative expenses 147,201 122,687  
Interest expense, net 20,284 19,858  
Other income (expense), net $ 2,586 4,811  
Restatement Adjustment | Accounting Standards Update 2017-07      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Selling, general and administrative expenses   300  
Interest expense, net   2,200  
Other income (expense), net   $ 2,500  
Transferred at Point in Time      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Revenue derived from performance obligations satisfied when control passes to customer (as a percent) 75.00%