CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (9,001)	$ (25,700)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	23,745	30,039
Amortization of inventory step-up in fair value	4,666	11,980
Share-based compensation	9,436	5,109
Deferred tax, net	(1,475)	(212)
(Gain) loss on sales of securities	(1,684)	205
Other non-cash transactions	575	2,931
Changes in operating assets and liabilities:
Accounts receivable, net	4,432	4,816
Inventories	75	536
Prepaid expenses and other assets	(317)	(1,051)
Accounts payable and accrued liabilities	4,229	(6,036)
Deferred revenue	(5,985)	10,656
Other long-term liabilities	(364)	(1,088)
Net cash provided by operating activities	28,332	32,185
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities	2,162	9,364
Proceeds on sale of fixed assets	109	0
Capital expenditures	(4,310)	(3,000)
Purchase of non-marketable investment	0	(200)
Purchase of technology rights	0	(624)
Net cash (used in) provided by investing activities	(2,039)	5,540
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock, net	821	318
Repayments of long-term debt	(15,500)	(9,563)
Bond and loan issuance costs	0	(228)
Repurchase of 3.50% senior convertible notes	0	(3,855)
Net cash used in financing activities	(14,679)	(13,328)
Effect of exchange rate changes on cash and cash equivalents	(415)	83
Net increase in cash and cash equivalents	11,199	24,480
Cash and cash equivalents at beginning of period	57,128	25,671
Cash and cash equivalents at end of period	$ 68,327	$ 50,151