Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 56,607	$ 51,959	$ 79,758
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	35,713	35,484	39,830
Deferred income taxes	9,064	(17,991)	280
Asset impairment		46,530	237
Insurance recovery		(56,152)
Loss on liquidation of subsidiary			315
Gain on the sale of property, plant and equipment	(229)	(190)	(69)
Stock-based compensation expense	6,270	5,097	5,415
Excess tax shortfall (benefits) from stock-based compensation	(76)	14	(1,176)
Changes in operating assets and liabilities:
Accounts receivable	(34,359)	27,703	(40,190)
Inventories	66,089	(72,666)	(48,008)
Prepaid expenses and other assets	32,375	12,087	(18,480)
Accounts payable	(21,081)	28,391	(16,675)
Accrued liabilities	3,176	2,655	5,356
Income taxes	(2,402)	(8,137)	(1,427)
Net cash provided by operations	151,147	54,784	5,166
Cash flows from investing activities:
Proceeds from sales and redemptions of investments	15,825	11,150	10,925
Additions to property, plant and equipment	(47,911)	(71,396)	(35,778)
Proceeds from the sale of property, plant and equipment	346	369	257
Additions to purchased software	(1,124)	(601)	(261)
Thailand flood property insurance proceeds	23,372
Net cash used in investing activities	(9,492)	(60,478)	(24,857)
Cash flows from financing activities:
Proceeds from stock options exercised	4,657	2,571	3,252
Excess tax (shortfall) benefits from stock-based compensation	76	(14)	1,176
Principal payments on capital lease obligations	(419)	(363)	(300)
Share repurchases	(47,106)	(56,281)	(58,855)
Debt issuance costs	(931)
Net cash used in financing activities	(43,723)	(54,087)	(54,727)
Effect of exchange rate changes	2,727	(2,644)	(480)
Net increase (decrease) in cash and cash equivalents	100,659	(62,425)	(74,898)
Cash and cash equivalents at beginning of year	283,920	346,345	421,243
Cash and cash equivalents at end of year	$ 384,579	$ 283,920	$ 346,345