Schedule of Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Schedule of Accrued Liabilities [Line Items]
Salaries, wages and related fringe benefits	$ 60,329		$ 59,080
Taxes	24,950		34,891
Advance payments on sales contracts	43,718		40,689
Product warranties	24,606	24,672	22,939	23,531	21,033	19,100
Other	48,072		55,949
Total accrued liabilities	$ 201,675		$ 213,548