CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Net loss	$ (62,375)	$ (45,273)	$ (124,742)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	90,676	74,993	76,948
(Gain) loss on disposal of property and equipment, net	(115)	(353)	8
Impairments	0	503	83,377
Amortization of debt discount and issuance costs	3,874	2,519	2,534
Stock-based compensation expense, net of capitalized amount	4,678	3,040	4,997
Equity in earnings of equity-method investment	0	(1,207)	(170)
Provision for doubtful accounts	882	1,049	1,093
Non-cash change in capital lease obligations	2,640	520	223
Non-cash change in exit activities and restructuring liability	4,751	6,291	4,409
Non-cash change in deferred rent	(979)	(3,554)	(2,152)
Deferred taxes	262	355	325
Loss on extinguishment and modification of debt	0	6,785	0
Other, net	(10)	304	179
Changes in operating assets and liabilities:
Accounts receivable	(1,352)	(207)	1,476
Prepaid expenses, deposits and other assets	(1,232)	2,051	2,297
Accounts payable	1,339	(1,167)	1,568
Accrued and current other liabilities	(1,583)	3,359	81
Deferred revenues	435	(1,297)	(476)
Exit activities and restructuring liability	(6,966)	(6,178)	(3,584)
Asset retirement obligation	(96)	(825)	(174)
Other liabilities	(257)	40	(52)
Net cash provided by operating activities	34,572	41,748	48,165
Cash Flows from Investing Activities:
Proceeds from sale of building	0	0	542
Purchases of property and equipment	(38,298)	(35,714)	(44,364)
Proceeds from disposal of property and equipment	662	402	0
Business acquisition, net of cash acquired	(131,748)	3,838	0
Acquisition of non-controlling interests	(1,130)	0	0
Additions to acquired and developed technology	(3,523)	(735)	(1,828)
Net cash used in investing activities	(174,037)	(32,209)	(45,650)
Cash Flows from Financing Activities:
Proceeds from credit agreements	148,500	316,900	4,500
Proceeds from stock issuance, net	37,151	40,195	0
Principal payments on credit agreements	(23,251)	(339,900)	(3,000)
Debt issuance costs	(7,302)	(12,777)	(1,716)
Payments on capital lease obligations	(12,040)	(9,714)	(9,472)
Proceeds from exercise of stock options	0	421	673
Acquisition of common stock for income tax withholdings	(488)	(235)	(530)
Other, net	110	(345)	(289)
Net cash provided by (used in) financing activities	142,680	(5,455)	(9,834)
Effect of exchange rates on cash and cash equivalents	5	130	(64)
Net increase in cash and cash equivalents	3,220	4,214	(7,383)
Cash and cash equivalents at beginning of period	14,603	10,389	17,772
Cash and cash equivalents at end of period	17,823	14,603	10,389
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	60,329	37,692	29,561
Non-cash acquisition of property and equipment under capital leases	43,909	189,679	6,042
Additions to property and equipment included in accounts payable	$ 2,459	$ 1,932	$ 1,873