Valuation And Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 4,102	$ 3,752	$ 3,770
Additions Charged to Cost and Expenses	78
Other		429
Deductions	62	79	18
Balance at End of Period	4,118	4,102	3,752
Inventory Valuation Reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	123,512	122,434	125,320
Additions Charged to Cost and Expenses	26,849	11,601	5,971
Other	5,353	6,815	4,110
Deductions	13,876	17,338	12,967
Balance at End of Period	$ 141,838	$ 123,512	$ 122,434