Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net loss	$ (28,723)	$ (108,971)
Deduct: Loss from discontinued operations	(27)	(127)
Loss from continuing operations	(28,696)	(108,844)
Adjustments to reconcile net loss to net cash provided by operating activities:
Deferred income taxes	5,527	(8,306)
Depreciation and amortization	13,582	6,242
Intangible asset impairment	2,000
Allowances against accounts receivable	(1,944)	2,756
Share-based compensation expense	2,442	3,167
Tax deficiency on exercises of stock options	(221)	(216)
Other, net	386	262
Changes in assets and liabilities:
Increase in accounts receivable	(7,316)	(25,017)
Decrease in inventories	13,646	2,900
(Increase) decrease in prepaid expenses and other assets	(4,219)	1,508
Increase in accounts payable, accrued expenses and other liabilities	30,130	197,338
Increase in payables due to distribution agreement partners	3,844	6,137
Increase in income taxes receivable/payable	(2,778)	(35,925)
Net cash provided by operating activities	26,383	42,002
Cash flows from investing activities:
Capital expenditures	(3,545)	(3,628)
Business acquisitions	(24,686)
Purchases of available for sale debt securities	(6,566)	(7,998)
Proceeds from maturity and sale of available for sale marketable debt securities	2,500	7,187
Net cash used in investing activities	(32,297)	(4,439)
Cash flows from financing activities:
Proceeds from issuances of common stock upon exercise of stock options	3,644	5,033
Proceeds from the issuance of common stock under the Employee Stock Purchase Program	76	84
Excess tax benefits on share-based compensation	2,980	5,935
Purchase of treasury stock	(2,051)	(6,983)
Principal payments under long-term debt	(4,375)
Cash settlement of share-based compensation		(4,133)
Net cash provided by (used in) financing activities	274	(64)
Net (decrease) increase in cash and cash equivalents	(5,640)	37,499
Cash and cash equivalents at beginning of period	162,516	218,674
Cash and cash equivalents at end of period	156,876	256,173
Cash (received) paid during the period for:
Income taxes, net	(60)	9,075
Interest paid	2,411	132
Non-cash transactions:
Capital expenditures incurred but not yet paid	$ 663	$ 121