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	$ 30,928	$ 127,987	$ 361,760
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,192	12,892	10,789
Amortization of debt discount		1,260	3,058
Non-cash equity-based compensation	14,268	12,807	8,769
Non-cash asset impairment	1,335	584
Loss on extinguishment of debt		3,349
Deferred income taxes	(340)	11,276	(25,141)
Gain on disposal of segment (see Note 3)	(4,112)		(156,290)
Excess tax benefits from stock option exercises	(2,119)	(10,406)	(23,271)
Other, net	262	(31)	(206)
Non-cash items from discontinued operations	(706)	44,381	14,030
Changes in operating assets and liabilities:
Accounts receivable	31,215	56,843	(83,160)
Inventories	53,937	(18,627)	(49,535)
Prepaid expenses and other current assets	5,518	(25,487)	(4,749)
Supplier deposits	3,006	12,400	(23,296)
Accounts payable	(12,106)	8,098	7,299
Accrued expenses, deferred revenue and other current liabilities	(34,227)	(72,723)	85,500
Income taxes payable	1,199	(42,204)	78,894
Transfers to restricted cash	(1,440)
Other, net	11,085	(6,957)	(4,742)
Discontinued operations	(1,932)		(5,495)
Net cash provided by operating activities	111,963	115,442	194,214
Cash Flows from Investing Activities
Capital expenditures	(24,994)	(60,364)	(10,724)
Payments for net assets of businesses acquired		(28,273)
Payment for purchase of cost method investment	(10,341)
Transfers from (to) restricted cash related to discontinued operations		75,540	(76,115)
Proceeds from the maturity of CDARS			213,641
Proceeds from sales of short-term investments	244,929	707,649	32,971
Payments for purchases of short-term investments	(165,080)	(588,453)	(506,103)
Proceeds from disposal of segment, net of transaction fees			225,188
Other	49	195	13
Proceeds from sale of assets from discontinued segment	3,758		(492)
Net cash provided by (used in) investing activities	48,321	106,294	(121,621)
Cash Flows from Financing Activities
Proceeds from stock option exercises	5,409	10,714	45,164
Restricted stock tax withholdings	(1,725)	(3,173)	(4,619)
Excess tax benefits from stock option exercises	2,119	10,406	23,271
Purchases of treasury stock		(162,077)	(38,098)
Repayments of long-term debt	(248)	(105,803)	(213)
Other		(2)
Net cash provided by (used in) financing activities	5,555	(249,935)	25,505
Effect of exchange rate changes on cash and cash equivalents	796	989	(1,466)
Net increase (decrease) in cash and cash equivalents	166,635	(27,210)	96,632
Cash and cash equivalents at beginning of period	217,922	245,132	148,500
Cash and cash equivalents at end of period	384,557	217,922	245,132
Supplemental disclosure of cash flow information
Interest paid	209	1,393	4,727
Income taxes paid	11,566	89,745	9,925
Non-cash investing and financing activities
Transfers from property, plant and equipment to inventory	1,230		3,913
Transfers from inventory to property, plant and equipment			$ 850