UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Cash Flows [Abstract]
Net loss	$ (38,377)	$ (111,633)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	57,596	57,927
Impairments	503	79,798
Amortization of debt discount and issuance costs	1,890	1,881
Stock-based compensation expense, net of capitalized amount	2,061	4,717
Equity in earnings of equity-method investment	(1,207)	(121)
Provision for doubtful accounts	808	902
Non-cash change in capital lease obligations	564	405
Non-cash change in exit activities and restructuring liability	5,824	865
Non-cash change in deferred rent	(3,335)	(1,490)
Deferred taxes	209	158
Payment of debt lender fees	(2,583)	(1,716)
Loss on extinguishment and modification of debt	6,785	0
Other, net	(49)	212
Changes in operating assets and liabilities:
Accounts receivable	243	1,894
Prepaid expenses, deposits and other assets	1,979	1,108
Accounts payable	(3,498)	4,853
Accrued and other liabilities	1,691	(629)
Deferred revenues	(1,233)	(304)
Exit activities and restructuring liability	(4,727)	(2,355)
Asset retirement obligation	191	(174)
Other liabilities	22	(33)
Net cash flows provided by operating activities	25,357	36,265
Cash Flows from Investing Activities:
Proceeds from sale of building	0	542
Purchases of property and equipment	(23,198)	(38,732)
Proceeds from disposal of property and equipment	206	0
Net cash from acquisition	3,838	0
Additions to acquired and developed technology	(635)	(1,211)
Net cash flows used in investing activities	(19,789)	(39,401)
Cash Flows from Financing Activities:
Proceeds from credit agreements	295,500	4,500
Proceeds from stock issuance	40,165	0
Principal payments on credit agreements	(327,250)	(2,250)
Debt issuance costs	(5,694)	0
Payments on capital lease obligations	(6,562)	(7,211)
Proceeds from exercise of stock options	159	675
Acquisition of common stock for income tax withholdings	(222)	(473)
Other, net	(302)	(250)
Net cash flows used in financing activities	(4,206)	(5,009)
Effect of exchange rates on cash and cash equivalents	217	13
Net increase (decrease) in cash and cash equivalents	1,579	(8,132)
Cash and cash equivalents at beginning of period	10,389	17,772
Cash and cash equivalents at end of period	11,968	9,640
Supplemental disclosure of cash flow information:
Cash paid for interest	25,898	21,957
Non-cash acquisition of property and equipment under capital leases	169,679	4,921
Additions to property and equipment included in accounts payable	$ 701	$ 3,606