Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities
Net income	$ 16,412	$ 52,642
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,715	2,661
Amortization of debt discount		769
Non-cash equity-based compensation	3,130	2,800
Loss on extinguishment of debt		304
Deferred income taxes	674	7,988
Excess tax benefits from stock option exercises	(91)	(2,188)
Other, net	14	42
Non-cash items from discontinued operations		1,041
Changes in operating assets and liabilities:
Accounts receivable	5,079	55,888
Inventories	10,599	(12,843)
Accounts payable	(2,179)	6,478
Accrued expenses, deferred profit and other current liabilities	(7,169)	(11,142)
Income taxes payable	(1,556)	(32,743)
Other, net	13,282	3,190
Net cash provided by operating activities	41,910	74,887
Investing activities
Capital expenditures	(8,455)	(9,402)
Transfers to restricted cash	(275)
Proceeds from sales of short-term investments	43,569	122,148
Payments for purchases of short-term investments	(18,503)	(154,339)
Other		1
Net cash provided by (used in) investing activities	16,336	(41,592)
Financing activities
Proceeds from stock option exercises	537	2,951
Restricted stock tax withholdings	(95)	(13)
Excess tax benefits from stock option exercises	91	2,188
Repayments of long-term debt	(60)	(7,514)
Other		6
Net cash provided by (used in) financing activities	473	(2,382)
Effect of exchange rate changes on cash and cash equivalents	(1,309)	792
Net increase in cash and cash equivalents	57,410	31,705
Cash and cash equivalents at beginning of year	217,922	245,132
Cash and cash equivalents at end of year	$ 275,332	$ 276,837