Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net (loss) income	$ (77,989)	$ 75,227
Deduct: (Loss) gain from discontinued operations, net of tax	(380)	105
(Loss) income from continuing operations	(77,609)	75,122
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Deferred income taxes	9,160	(3,884)
Resolution of tax contingencies		(3,750)
Non-cash interest expense		1,571
Depreciation and amortization	17,994	21,080
Intangible asset impairments	24,226
Allowances against accounts receivable	8,092	(3,869)
Share-based compensation expense	7,813	11,824
Tax deficiency on exercises of stock options	(392)
Loss on disposal of fixed assets	111	60
Other, net	782
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	(10,490)	58,715
(Increase) decrease in inventories	(8,406)	4,066
Increase in prepaid expenses and other assets	(5,931)	(4,637)
Increase in accounts payable, accrued expenses and other liabilities	38,818	21,437
Increase (decrease) in payables due to distribution agreement partners	28,163	(33,181)
(Increase) decrease in income taxes receivable/payable	(18,458)	3,736
Net cash provided by operating activities	13,873	148,290
Cash flows from investing activities:
Capital expenditures	(7,621)	(8,736)
Purchases of intangibles	(850)	(41,500)
Purchases of available for sale debt securities	(26,026)	(33,202)
Proceeds from maturity and sale of available for sale marketable debt securities	22,000	29,865
Net cash used in investing activities	(12,497)	(53,573)
Cash flows from financing activities:
Proceeds from issuances of common stock upon exercise of stock options	10,029	10,325
Proceeds from the issuance of common stock under the Employee Stock Purchase Program	253	254
Excess tax benefits on share-based compensation	7,138	203
Purchase of treasury stock	(7,368)	(2,202)
Reductions in principal due to maturity and repurchases of senior subordinated convertible notes		(47,746)
Cash settlement of share-based compensation	(4,133)	(139)
Net cash provided by (used in) financing activities	5,919	(39,305)
Net increase in cash and cash equivalents	7,295	55,412
Cash and cash equivalents at beginning of period	218,674	121,668
Cash and cash equivalents at end of period	225,969	177,080
Cash (received) paid during the period for:
Income taxes, net	(347)	38,428
Interest paid	265	1,372
Non-cash transactions:
Capital expenditures incurred but not yet paid	$ 277	$ 593