Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income	$ 19,178	$ 29,214
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,443	17,387
Deferred income taxes	4,244	968
Gain on the sale of property, plant and equipment	(190)	(35)
Asset impairment		24
Stock-based compensation expense	3,050	2,640
Excess tax benefit from stock-based compensation	(22)	(41)
Changes in operating assets and liabilities:
Accounts receivable	(33,503)	5,236
Inventories	1,908	(32,030)
Prepaid expenses and other assets	14,659	6,175
Accounts payable	(8,044)	(3,463)
Accrued liabilities	2,346	(7,199)
Income taxes	(3,455)	(7,132)
Net cash provided by operations	17,614	11,744
Cash flows from investing activities:
Proceeds from sales and redemptions of investments	9,025	7,150
Additions to property, plant and equipment	(20,426)	(36,328)
Proceeds from the sale of property, plant and equipment	198	150
Additions to purchased software	(460)	(499)
Thailand flood property insurance proceeds	9,966
Net cash used in investing activities	(1,697)	(29,527)
Cash flows from financing activities:
Proceeds from stock options exercised	2,256	1,455
Excess tax benefits from stock-based compensation	22	41
Principal payments on capital lease obligations	(200)	(180)
Share repurchases	(23,292)	(24,680)
Net cash used in financing activities	(21,214)	(23,364)
Effect of exchange rate changes	2,189	1,310
Net decrease in cash and cash equivalents	(3,108)	(39,837)
Cash and cash equivalents at beginning of year	283,920	346,345
Cash and cash equivalents at June 30	$ 280,812	$ 306,508