Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	May 14, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 05, 2014
Summary Of Significant Accounting Policies [Line Items]
Common stock, shares authorized	200,000,000	200,000,000	200,000,000
Stock split ratio	2
Percentage of stock dividend	100.00%
Shares issued during stock split	66,200,000
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Allowance for doubtful accounts		$ 6,300,000	$ 5,700,000
Product warranty expense		34,100,000	23,100,000	22,900,000
Accrued product warranty		87,849,000	60,593,000	58,212,000
Interest rate swap agreement, Current Liability		3,351,000	3,005,000
Foreign exchange transaction losses recognized in other (expense) income, net		(2,445,000)	(3,512,000)	(134,000)
Unbilled accounts receivable		187,762,000	205,045,000
Customer deposits		111,797,000	66,573,000
Provisions for loss contracts		7,100,000	14,000,000
Deferred pre-production costs		24,900,000	19,200,000
Research and development costs		61,886,000	46,289,000	41,307,000
Percentage of work force covered by collective bargaining agreements		28.00%
Collective bargaining agreement, effective duration		2017
Agreements Expiring In 2015
Summary Of Significant Accounting Policies [Line Items]
Percentage of work force covered by collective bargaining agreements		21.00%
Forward Starting Interest Rate Swap Agreement
Summary Of Significant Accounting Policies [Line Items]
Interest rate swap agreements, notional amount		150,000,000			150,000,000
Interest rate swap agreement, Current Liability		3,351,000	3,005,000
Interest rate swap, accumulated other comprehensive loss		$ (2,243,000)	$ (2,010,000)