Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating activities:
Net income	$ 196,228	$ 331,491	$ 39,972
Adjustments:
Depreciation and amortization	180,484	189,200	266,672
Stock-based compensation expense	108,300	50,318	66,441
Non-cash restructuring of operations and other items, net	5,960	35,282	45,681
Gain on re-measurement of a pre-acquisition equity interest to fair value	(5,765)
(Gain)/loss on sale/write-down of investments, net	(2,550)	183	6,779
Gain on sale of business	0	(260,066)	0
Loss/(gain) on sale of property and equipment	2,528	(465)	11
Unrealized foreign exchange (gain)/loss	(598)	(2,015)	4,311
Deferred taxes	(53,218)	(28,838)	3,512
Changes in assets and liabilities, net of assets acquired and liabilities assumed in business combinations:
Accounts receivable, net	(6,689)	80,065	12,357
Inventories	(2,116)	(29,804)	(17,437)
Prepaid expenses and other assets	(17,570)	(10,782)	14,404
Accounts payable	27,543	(3,879)	(35,213)
Accrued and other liabilities	(58,378)	(103,915)	(40,315)
Net cash provided by operating activities	374,159	246,775	367,175
Investing activities:
Purchases of debt securities available-for-sale	(131,662)	(50,967)	(44,643)
Proceeds from maturities and sales of debt securities available-for-sale	57,843	37,460	56,529
Purchases of other investments	(500)	(4,000)	(316)
Proceeds from sale of other investments	2,550		9,795
Purchases of property and equipment	(130,779)	(60,920)	(92,342)
Proceeds from sale of property and equipment	1,693	23,622	840
Acquisition of business, net of cash acquired	(319,231)
Proceeds from sale of business, net of transaction costs		475,150
Proceeds from repayments on a note receivable		10,000	10,000
Net cash (used in)/provided by investing activities	(520,086)	430,345	(60,137)
Financing activities:
Redemption of convertible subordinated notes			(349,999)
Issuances of common stock	111,628	81,040	40,883
Purchase of common stock under repurchase programs	(272,585)	(498,786)	(249,942)
Net cash used in financing activities	(160,957)	(417,746)	(559,058)
Effect of exchange rate changes on cash and cash equivalents	(1,399)	(1,349)	(4,485)
Net change in cash and cash equivalents	(308,283)	258,025	(256,505)
Cash and cash equivalents at beginning of year	779,811	521,786	778,291
Cash and cash equivalents at end of year	$ 471,528	$ 779,811	$ 521,786