Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net (loss) income	$ (99,917)	$ 44,693
Deduct: (Loss) gain from discontinued operations, net of tax	253	(232)
(Loss) income from continuing operations	(99,664)	44,461
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Deferred income taxes	9,162	(4,662)
Resolution of tax contingencies		(3,750)
Non-cash interest expense		1,038
Depreciation and amortization	12,381	14,921
Intangible asset impairments	24,226
Allowances against accounts receivable	6,280	(8,200)
Share-based compensation expense	5,582	8,298
Tax deficiency on exercises of stock options	(382)
Loss on disposal of fixed assets	110	60
Other, net	514
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	(33,205)	30,860
(Increase) decrease in inventories	(2,773)	11,907
Decrease (increase) in prepaid expenses and other assets	2,139	(4,417)
Increase in accounts payable, accrued expenses and other liabilities	196,544	19,090
Increase (decrease) in payables due to distribution agreement partners	25,125	(14,108)
(Increase) decrease in income taxes receivable/payable	(45,899)	8,753
Net cash provided by operating activities	100,140	104,251
Cash flows from investing activities:
Capital expenditures	(5,587)	(5,130)
Purchases of intangibles	(450)	(35,500)
Purchases of available for sale debt securities	(23,410)	(33,202)
Proceeds from maturity and sale of available for sale marketable debt and equity securities	12,000	21,601
Net cash used in investing activities	(17,447)	(52,231)
Cash flows from financing activities:
Proceeds from issuances of common stock upon exercise of stock options	9,810	2,763
Proceeds from the issuance of common stock under the Employee Stock Purchase Program	170	155
Excess tax benefits on share-based compensation	6,859	455
Purchase of treasury stock	(7,062)	(1,812)
Cash settlement of share-based compensation	(4,133)
Net cash provided by financing activities	5,644	1,561
Net increase in cash and cash equivalents	88,337	53,581
Cash and cash equivalents at beginning of period	218,674	121,668
Cash and cash equivalents at end of period	307,011	175,249
Cash paid during the period for:
Income taxes	9,120	21,003
Interest paid	198	686
Non-cash transactions:
Capital expenditures incurred but not yet paid	$ 698	$ 1,296