CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities:
Net loss	$ (43,014)	$ (38,377)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	67,097	57,596
(Gain) loss on disposal of fixed asset	(98)	503
Amortization of debt discount and issuance costs	2,798	1,890
Stock-based compensation expense, net of capitalized amount	3,573	2,061
Equity in earnings of equity-method investment	0	(1,207)
Provision for doubtful accounts	706	808
Non-cash change in capital lease obligations	(241)	564
Non-cash change in exit activities and restructuring liability	3,198	5,824
Non-cash change in deferred rent	(851)	(3,335)
Deferred taxes	65	209
Loss on extinguishment and modification of debt	0	6,785
Other, net	(6)	(49)
Changes in operating assets and liabilities:
Accounts receivable	(4,990)	243
Prepaid expenses, deposits and other assets	(3,531)	1,979
Accounts payable	9,372	(3,498)
Accrued and other liabilities	(601)	1,691
Deferred revenues	617	(1,233)
Exit activities and restructuring liability	(4,597)	(4,727)
Asset retirement obligation	(141)	191
Other liabilities	(199)	22
Net cash provided by operating activities	29,157	27,940
Cash Flows from Investing Activities:
Purchases of property and equipment	(27,317)	(23,198)
Proceeds from disposal of property and equipment	570	206
Business acquisition, net of cash acquired	(131,748)	3,838
Acquisition of non-controlling interests	(1,130)	0
Additions to acquired and developed technology	(2,128)	(635)
Net cash used in investing activities	(161,753)	(19,789)
Cash Flows from Financing Activities:
Proceeds from credit agreements	148,500	295,500
Proceeds from stock issuance	0	40,165
Principal payments on credit agreements	(3,267)	(327,250)
Debt issuance costs	(7,696)	(8,277)
Payments on capital lease obligations	(7,202)	(6,562)
Proceeds from exercise of stock options	(210)	159
Acquisition of common stock for income tax withholdings	(487)	(222)
Other, net	175	(302)
Net cash provided by (used in) in financing activities	129,813	(6,789)
Effect of exchange rates on cash and cash equivalents	24	217
Net (decrease) increase in cash and cash equivalents	(2,759)	1,579
Cash and cash equivalents at beginning of period	14,603	10,389
Cash and cash equivalents at end of period	11,844	11,968
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	44,324	25,898
Non-cash acquisition of property and equipment under capital leases	33,381	169,679
Additions to property and equipment included in accounts payable	$ 4,004	$ 701