Condensed Consolidated Statements Of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (60,437)	$ (8,497)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization of property and equipment	9,187	5,525
Amortization of intangible assets	11,836	12,717
Stock-based compensation expense	7,672	9,269
Loss (gain) on disposal of property and equipment, net	(434)	10
Impairment of goodwill	6,664	0
Non-cash restructuring, impairment of long-lived assets and other charges	17,197	0
Deferred income tax, net	(38,743)	1
Amortization of premium/discount on investments and other	43	653
Changes in operating assets and liabilities:
Accounts receivable, net	8,094	3,143
Inventories	766	(799)
Other assets	2,140	(3,707)
Accounts payable	(4,468)	2,077
Accrued legal fees	(95)	2,115
Accrued liabilities	(2,148)	(2,113)
Deferred revenue	(256)	555
Other liabilities	0	241
Net cash from operating activities	(42,982)	21,190
Cash flows from investing activities:
Purchases of property and equipment	(14,090)	(6,505)
Proceeds from sale of property and equipment	3,636	23
Purchases of short-term available-for-sale investments	(108,620)	(134,647)
Proceeds from maturities and sales of short-term and long-term investments	142,913	211,470
Acquisition, net of assets acquired	0	(27,173)
Purchases of intangible assets	(2,250)	(3,237)
Net cash from investing activities	21,589	39,931
Cash flows from financing activities:
Dividend paid	(26,663)	(5,192)
Proceeds from exercise of stock options	19,206	1,749
Proceeds from employee stock purchase program	2,030	2,025
Repurchase of common stock	(212)	(23)
Net cash from financing activities	(5,639)	(1,441)
Net increase (decrease) in cash and cash equivalents	(27,032)	59,680
Cash and cash equivalents at beginning of period	103,802	55,758
Cash and cash equivalents at end of period	$ 76,770	$ 115,438