Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating activities
Net income (loss)	$ 127,987	$ 361,760	$ (15,632)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	12,892	10,789	12,227
Amortization of debt discount	1,260	3,058	2,846
Non-cash equity-based compensation	12,807	8,769	7,113
Non-cash asset impairment	584		304
Non-cash inventory write-off	758		1,526
Non-cash restructuring		(179)
Loss on extinguishment of debt	3,349
Deferred income taxes	11,276	(25,141)	(414)
Gain on disposal of segment (see Note 3)		(156,290)
Excess tax benefits from stock option exercises	(10,406)	(23,271)
Other, net	(31)	(27)	44
Non-cash items from discontinued operations	44,381	14,030	10,877
Changes in operating assets and liabilities:
Accounts receivable	56,843	(83,160)	(28,379)
Inventories	(19,385)	(49,535)	10,322
Prepaid expenses and other current assets	(25,487)	(4,749)	(1,418)
Supplier deposits	12,400	(23,296)	117
Accounts payable	8,098	7,299	3,067
Accrued expenses, deferred profit and other current liabilities	(72,723)	85,500	51,582
Income taxes payable	(42,204)	78,894	1,482
Other, net	(6,957)	(4,742)	(1,486)
Discontinued operations		(5,495)	4,860
Net cash provided by operating activities	115,442	194,214	59,038
Investing activities
Capital expenditures	(60,364)	(10,724)	(7,460)
Payments for net assets of businesses acquired	(28,273)		(2,434)
Payments of earn-outs for businesses acquired			(195)
Transfers from restricted cash, net	75,540	(76,115)
Proceeds from the maturity of CDARS		213,641
Proceeds from sales of short-term investments	707,649	32,971
Payments for purchases of short-term investments	(588,453)	(506,103)	(135,000)
Proceeds from the sale of property, plant and equipment		13	834
Proceeds from disposal of segment, net of transaction fees (see Note 3)		225,188
Other	195
Discontinued operations		(492)	(10,510)
Net cash provided by (used in) investing activities	106,294	(121,621)	(154,765)
Financing activities
Proceeds from stock option exercises	10,714	45,164	12,586
Proceeds from issuance of common stock			130,086
Restricted stock tax withholdings	(3,173)	(4,619)	(607)
Excess tax benefits from stock option exercises	10,406	23,271
Purchases of treasury stock	(162,077)	(38,098)
Repayments of long-term debt	(105,803)	(213)	(196)
Other	(2)
Net cash (used in) provided by financing activities	(249,935)	25,505	141,869
Effect of exchange rate changes on cash and cash equivalents	989	(1,466)	(163)
Net (decrease) increase in cash and cash equivalents	(27,210)	96,632	45,979
Cash and cash equivalents at beginning of year	245,132	148,500	102,521
Cash and cash equivalents at end of year	217,922	245,132	148,500
Supplemental disclosure of cash flow information
Interest paid	1,393	4,727	4,935
Income taxes paid	89,745	9,925	1,808
Non-cash investing and financing activities
Accrual of payment for net assets of businesses acquired			1,000
Transfers from property, plant and equipment to inventory		3,913	1,159
Transfers from inventory to property, plant and equipment		850	23
Sale of property, plant and equipment with note receivable		$ 140