Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income	$ 58,431	$ 43,670
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	30,384	26,296
Amortization	3,601	3,339
Deferred income taxes	10,649	9,001
(Gain) loss on the sale of property, plant and equipment	588	(1,260)
Asset impairments	184	4,825
Thailand flood insurance recovery	(550)	0
Stock-based compensation expense	5,626	5,310
Excess tax benefits from stock-based compensation	(558)	(285)
Changes in operating assets and liabilities, net of effects from businss acquisition:
Accounts receivable	24,691	47,137
Inventories	(38,603)	(56,453)
Prepaid expenses and other assets	(3,088)	4,778
Accounts payable	17,545	24,507
Accrued liabilities	7,643	(8,701)
Income taxes	(2,638)	(2,233)
Net cash provided by operations	113,905	99,931
Cash flows from investing activities:
Proceeds from sales and redemptions of investments	10,056	25
Additions to property, plant and equipment	(35,743)	(18,268)
Proceeds from the sale of property, plant and equipment	289	1,796
Additions to purchased software	(871)	(1,879)
Business acquisition, net of cash acquired	750	(19,270)
Thailand flood property insurance proceeds	550	0
Other	363	0
Net cash used in investing activities	(24,606)	(37,596)
Cash flows from financing activities:
Proceeds from stock options exercised	11,748	10,405
Excess tax benefits from stock-based compensation	558	285
Principal payments on capital lease obligations	(431)	(368)
Share repurchases	(25,045)	(30,673)
Net cash used in financing activities	(13,170)	(20,351)
Effect of exchange rate changes	(1,448)	(3)
Net increase in cash and cash equivalents	74,681	41,981
Cash and cash equivalents at beginning of year	345,555	384,579
Cash and cash equivalents at end of period	$ 420,236	$ 426,560