Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 49,081	$ 60,748
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	26,154	30,216
Deferred income taxes	(11,485)	(2,624)
Gain on the sale of property, plant and equipment	(35)	(69)
Asset impairment	24	105
Stock-based compensation expense	4,102	4,376
Excess tax benefits from stock-based compensation	(35)	(846)
Changes in operating assets and liabilities:
Accounts receivable	(7,049)	(10,804)
Inventories	(69,514)	(65,831)
Prepaid expenses and other assets	8,615	(13,866)
Accounts payable	19,426	(10,056)
Accrued liabilities	(9,837)	(560)
Income taxes	(9,281)	4,348
Net cash provided by (used in) operations	166	(4,863)
Cash flows from investing activities:
Proceeds from sales and redemptions of investments	11,100	10,225
Additions to property, plant and equipment	(49,756)	(28,934)
Proceeds from the sale of property, plant and equipment	186	231
Additions to purchased software	(540)	(117)
Net cash used in investing activities	(39,010)	(18,595)
Cash flows from financing activities:
Proceeds from stock options exercised	1,606	1,746
Excess tax benefits from stock-based compensation	35	846
Principal payments on capital lease obligations	(272)	(223)
Share repurchases	(53,188)	(53,577)
Net cash used in financing activities	(51,819)	(51,208)
Effect of exchange rate changes	(1,837)	(278)
Net decrease in cash and cash equivalents	(92,500)	(74,944)
Cash and cash equivalents at beginning of year	346,345	421,243
Cash and cash equivalents at September 30	$ 253,845	$ 346,299