UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities:
Net loss	$ (9,644)	$ (10,442)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	19,113	20,208
Amortization of debt discount and issuance costs	522	490
Stock-based compensation expense, net of capitalized amount	1,922	1,579
Equity in earnings of equity-method investment	(36)	(39)
Provision for doubtful accounts	341	400
Non-cash change in capital lease obligations	487	(760)
Non-cash change in exit activities and restructuring liability	347	371
Non-cash change in deferred rent	(484)	(401)
Deferred taxes	77	54
Other, net	202	(242)
Changes in operating assets and liabilities:
Accounts receivable	537	(1,724)
Prepaid expenses, deposits and other assets	1,946	(1,544)
Accounts payable	(1,815)	(7,652)
Accrued and other liabilities	(1,903)	(903)
Deferred revenues	191	(256)
Exit activities and restructuring liability	(804)	(663)
Asset retirement obligation	(174)
Other liabilities	(43)	17
Net cash flows provided by (used in) operating activities	10,782	(1,507)
Cash Flows from Investing Activities:
Purchases of property and equipment	(12,282)	(14,990)
Additions to acquired and developed technology	(399)	(712)
Net cash flows used in investing activities	(12,681)	(15,702)
Cash Flows from Financing Activities:
Proceeds from credit agreements	1,500	13,000
Principal payments on credit agreements	(750)	(750)
Payments on capital lease obligations	(2,359)	(1,770)
Proceeds from exercise of stock options		2,583
Acquisition of common stock for income tax withholdings	(216)	(618)
Other, net	(76)	979
Net cash flows (used in) provided by financing activities	(1,901)	13,424
Effect of exchange rates on cash and cash equivalents	(74)	(80)
Net decrease in cash and cash equivalents	(3,874)	(3,865)
Cash and cash equivalents at beginning of period	17,772	20,084
Cash and cash equivalents at end of period	13,898	16,219
Supplemental disclosure of cash flow information:
Cash paid for interest	6,540	6,450
Non-cash acquisition of property and equipment under capital leases	4,056	1,166
Additions to property and equipment included in accounts payable	$ 6,025	$ 6,530