CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net loss	$ (33,748)	$ (134,336)	$ (43,053)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Stock-based compensation	14,981	22,546	27,996
Depreciation	15,451	13,190	11,894
Amortization of intangible assets	28,909	30,345	20,191
Non-cash interest expense and amortization of convertible debt issuance costs	19,296	14,695	12,622
Impairment of goodwill and long-lived assets	17,751	35,471	0
Impairment of investment in non-marketable equity security	1,400	0	0
Deferred tax (benefit) provision	1,919	3,728	(246)
Non-cash restructuring	653	0	0
Loss on disposal of property, plant and equipment	364	8	0
Gain from sale of intellectual property	(1,388)	0	0
Non-cash acquisition of patents	0	0	(3,000)
Change in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(1,722)	497	2,714
Prepaids and other assets	6,174	8,379	8,810
Accounts payable	(1,544)	(9,664)	10,452
Accrued salaries and benefits and other accrued liabilities	(7,114)	1,847	(741)
Accrued litigation expenses	(9,324)	(680)	6,442
Income taxes payable	(716)	(3,522)	(1,047)
Net cash provided by (used in) operating activities	51,342	(17,496)	53,034
Cash flows from investing activities:
Purchases of property, plant and equipment	(6,938)	(21,809)	(19,431)
Acquisition of intangible assets	(2,656)	(1,700)	(1,210)
Purchases of marketable securities	(125,554)	(110,716)	(173,996)
Maturities of marketable securities	119,600	183,086	337,880
Proceeds from sale of marketable securities	11,020	0	33
Proceeds from sale of intellectual property and property, plant and equipment	2,255	0	0
Acquisition of businesses, net of cash acquired	0	(46,278)	(167,381)
Net cash provided by (used in) investing activities	(2,273)	2,583	(24,105)
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes	138,000	0	0
Issuance costs related to issuance of convertible senior notes	(3,603)	0	0
Proceeds received from issuance of common stock under employee stock plans	8,391	4,103	12,282
Payments under installment payment arrangement	(1,829)	(1,923)	(2,531)
Principal payments against financing lease obligation	(178)	(522)	(456)
Payment to redeem contingently redeemable common stock pursuant to the settlement agreement with Samsung	0	0	(100,000)
Proceeds from landlord for tenant improvements	0	0	8,800
Net cash provided by (used in) financing activities	140,781	1,658	(81,905)
Effect of exchange rate changes on cash and cash equivalents	(138)	(5)	(42)
Net increase (decrease) in cash and cash equivalents	189,712	(13,260)	(53,018)
Cash and cash equivalents at beginning of year	148,984	162,244	215,262
Cash and cash equivalents at end of year	338,696	148,984	162,244
Cash paid during the period for:
Interest	8,625	8,625	8,625
Income taxes, net of refunds	18,720	16,384	16,254
Non-cash investing and financing activities:
Non-cash obligation for property, plant and equipment	0	2,512	7,409
Property, plant and equipment received and accrued in accounts payable and other accrued liabilities	5,909	1,709	3,093
Common stock, net, issued pursuant to acquisition	$ 0	$ 0	$ 86,143