UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows from Operating Activities:
Net loss	$ (37,173)	$ (31,237)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	67,404	59,308
Impairment of property and equipment	232	537
Amortization of debt discount and issuance costs	1,498	1,441
Stock-based compensation expense, net of capitalized amount	6,200	5,675
Equity in (earnings) of equity-method investment	(96)	(198)
Provision for doubtful accounts	922	811
Non-cash change in capital lease obligations	(1,167)	(87)
Non-cash change in exit activities and restructuring liability	1,400	2,996
Non-cash change in deferred rent	(1,287)	(2,028)
Deferred taxes	(2,181)	(1,226)
Other, net	230	197
Changes in operating assets and liabilities:
Accounts receivable	(3,459)	3,198
Prepaid expenses, deposits and other assets	836	(3,080)
Accounts payable	(7,748)	(2,585)
Accrued and other liabilities	(1,862)	4,795
Deferred revenues	624	99
Exit activities and restructuring liability	(2,014)	(2,296)
Other liabilities	34	(90)
Net cash flows provided by operating activities	22,393	36,230
Cash Flows from Investing Activities:
Purchases of property and equipment	(41,299)	(51,312)
Additions to acquired and developed technologies	(1,120)	(2,004)
Proceeds from sale-leaseback transactions		2,603
Acquisition, net of cash received		74
Net cash flows used in investing activities	(42,419)	(50,639)
Cash Flows from Financing Activities:
Proceeds from credit agreements	21,000	5,000
Principal payments on credit agreements	(2,250)	(2,250)
Return of deposit collateral on credit agreement		6,461
Payments on capital lease obligations	(5,718)	(4,212)
Proceeds from exercise of stock options	6,005	973
Acquisition of common stock for income tax withholdings	(1,332)	(744)
Other, net	869	(135)
Net cash flows provided by financing activities	18,574	5,093
Effect of exchange rates on cash and cash equivalents	(320)	(209)
Net decrease in cash and cash equivalents	(1,772)	(9,525)
Cash and cash equivalents at beginning of period	20,084	35,018
Cash and cash equivalents at end of period	18,312	25,493
Supplemental disclosure of cash flow information:
Cash paid for interest	19,712	18,109
Non-cash acquisition of property and equipment under capital leases	4,342	7,757
Additions to property and equipment included in accounts payable	$ 3,540	$ 11,117