Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net (loss) income	$ (26,145)	$ 92,731	$ 76,928
Deduct: Income (loss) from discontinued operations	20,155	(21)	(672)
(Loss) income from continuing operations	(46,300)	92,752	77,600
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes	(3,257)	(478)	24,375
Resolution of tax contingencies	(4,405)	(3,750)
Non-cash interest expense		1,571	4,399
Depreciation and amortization	28,036	29,389	35,612
Intangible asset impairments	24,226
Allowances against accounts receivable	24,439	(5,985)	2,101
Share-based compensation expense	9,830	14,074	13,737
Tax deficiency on exercises of stock options		(1,039)
Other, net	1,298	1,093	614
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	(39,588)	65,117	(74,451)
(Increase) decrease in inventories	(12,191)	8,149	(36,404)
(Increase) decrease in prepaid expenses and other assets	(1,454)	(7,127)	5,313
Increase in accounts payable, accrued expenses and other liabilities	39,200	8,144	6,644
Increase (decrease) in payables due to distribution agreement partners	43,264	(33,242)	(32,899)
Decrease (increase) in income taxes receivable/payable	1,880	(4,359)	26,707
Net cash provided by operating activities	64,978	164,309	53,348
Cash flows from investing activities:
Capital expenditures	(11,600)	(10,685)	(8,519)
Purchases of intangibles	(34,450)	(42,200)	(1,000)
Business acquisitions	(412,753)		(55,300)
Purchases of available for sale debt securities	(26,026)	(33,202)	(10,000)
Proceeds from maturity and sale of available for sale marketable debt securities	26,973	44,053	65,366
Net cash used in investing activities	(457,856)	(42,034)	(9,453)
Cash flows from financing activities:
Borrowings under credit facility	350,000
Proceeds from issuances of common stock upon exercise of stock options	10,350	24,794	718
Proceeds from the issuance of common stock under the Employee Stock Purchase Program	333	354	238
Excess tax benefits on share-based compensation		3,092	181
Purchase of treasury stock	(8,004)	(4,829)	(2,187)
Reductions in principal due to maturity and repurchases of senior subordinated convertible notes		(47,746)	(91,806)
Principal payments under long-term debt	(4,375)
Debt issuance costs	(7,451)	(934)
Cash settlement of share-based compensation	(4,133)
Net cash provided by (used in) financing activities	336,720	(25,269)	(92,856)
Net (decrease) increase in cash and cash equivalents	(56,158)	97,006	(48,961)
Cash and cash equivalents at beginning of period	218,674	121,668	170,629
Cash and cash equivalents at end of period	162,516	218,674	121,668
Cash (received) paid during the period for:
Income taxes, net	(260)	48,517	(2,003)
Interest paid	1,361	1,372	3,800
Non-cash transactions:
Capital expenditures incurred but not yet paid	$ 764	$ 775	$ 620