Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net income	$ 20,387	$ 74,553
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	18,610	19,744
Non-cash losses (gains) on sale of fixed assets, net	365	(1,882)
Other non-cash gains, net	(764)	(4,510)
Provision for doubtful accounts receivable	83	45
Accretion of interest on long-term debt	330	183
Stock-based compensation expense	19,327	18,889
Excess tax benefit on stock-based compensation	(971)	(3,293)
Non-cash acquisition-related and other charges	1,317
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable	7,863	6,546
Inventories	20,000	(42,256)
Current and other assets	21,497	(4,890)
Trade accounts payable	13,779	7,779
Accrued and other liabilities	(51,217)	13,012
Deferred income on shipments to distributors	(10,001)	(9,807)
Net cash provided by operating activities	60,605	74,113
Cash flows from investing activities
Acquisitions of fixed assets	(7,386)	(30,851)
Proceeds from the sale of business, net of cash		1,597
Acquisition of businesses, net of cash		(819)
Acquisitions of intangible assets	(1,000)	(1,000)
Sales or maturities of marketable securities	1,000	3,742
Net cash used in investing activities	(7,386)	(27,331)
Cash flows from financing activities
Principal payments on debt		(79)
Repurchase of common stock	(96,175)	(85,231)
Proceeds from issuance of common stock	7,747	14,951
Tax payments related to shares withheld for vested restricted stock units	(5,433)	(5,919)
Excess tax benefit on stock-based compensation	971	3,293
Net cash used in financing activities	(92,890)	(72,985)
Effect of exchange rate changes on cash and cash equivalents	(1,398)	5,507
Net decrease in cash and cash equivalents	(41,069)	(20,696)
Cash and cash equivalents at beginning of the period	329,431	501,455
Cash and cash equivalents at end of the period	$ 288,362	$ 480,759