CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (3,633)	$ (15,161)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	16,511	17,472
Share-based compensation	4,374	5,032
Unrealized gain on hedging instruments	(50)	0
Realized gain on debt and equity investments	(84)	(255)
Other-than-temporary-impairment on non-marketable securities	1,156	4,920
Deferred tax assets	2	(37)
Amortization of debt offering costs	204	520
Gains from repurchase of convertible notes	0	(1,744)
Gain on disposal of property and equipment	(295)	0
Impairment of property and equipment	0	348
Changes in operating assets and liabilities:
Accounts receivable, net	7,675	12,445
Inventories	1,474	(821)
Prepaid expenses and other assets	3,968	6,848
Accounts payable and accrued liabilities	(7,530)	(6,973)
Deferred revenue	(1,428)	(1,007)
Other long-term liabilities	(275)	(607)
Net cash provided by operating activities	22,069	20,980
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(3,447)	(5,631)
Purchases of available-for-sale securities	(53,482)	(268,648)
Proceeds from sales of available-for-sale securities	12,723	210,737
Proceeds from maturities of available-for-sale securities	14,030	80,422
Proceeds from sale of property and equipment	400	0
Purchase of technology rights	(150)	(250)
Net cash (used in) provided by investing activities	(29,926)	16,630
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock, net	(632)	(926)
Repurchase of convertible notes	(3)	(24,676)
Net cash used in financing activities	(635)	(25,602)
Effect of exchange rate changes on cash and cash equivalents	404	(466)
Net (decrease) increase in cash and cash equivalents	(8,088)	11,542
Cash and cash equivalents at beginning of period	35,484	65,642
Cash and cash equivalents at end of period	$ 27,396	$ 77,184