CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities:
Net loss	$ (138,169)	$ (61,075)	$ (44,166)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	85,713	88,416	73,429
Loss (gain) on disposal of property and equipment	527	(115)	(353)
Gain on sale of business	(4,196)	0	0
Goodwill and intangibles impairment	59,126	0	0
Other impairments	2,391	0	503
Amortization of debt discount and issuance costs	5,398	4,084	2,309
Stock-based compensation expense, net of capitalized amount	4,239	4,678	3,040
Equity in earnings of equity-method investment	0	0	(1,207)
Provision for doubtful accounts	899	882	1,049
Non-cash change in finance lease liabilities	3,300	2,507	1,187
Non-cash change in exit activities and restructuring liability	6,339	4,751	6,291
Non-cash change in deferred rent	0	(979)	(3,554)
Deferred income taxes	(2,352)	262	355
Loss on extinguishment and modification of debt	0	0	6,785
Other, net	47	(10)	304
Changes in operating assets and liabilities:
Accounts receivable	3,272	(359)	(769)
Prepaid expenses, deposits and other assets	4,576	(1,232)	2,051
Operating lease right-of-use assets	(3,798)	0	0
Accounts payable	(3,076)	1,546	(949)
Accrued and current other liabilities	(4,288)	(1,916)	3,359
Accreted interest	2,040	0	0
Deferred revenues	(1,496)	1,220	(1,297)
Exit activities and restructuring liability	(4,237)	(6,966)	(6,178)
Short and long-term operating lease liabilities	6,117	0	0
Asset retirement obligation	231	(96)	(825)
Other liabilities	60	(257)	40
Net cash provided by operating activities	22,663	35,341	41,404
Cash Flows from Investing Activities:
Proceeds from sale of business	3,200	0	0
Purchases of property and equipment	(31,867)	(38,505)	(35,932)
Proceeds from disposal of property and equipment	481	662	402
Business acquisition, net of cash acquired	0	(131,748)	3,838
Additions to acquired and developed technology	(1,115)	(3,523)	(735)
Net cash used in investing activities	(29,301)	(173,114)	(32,427)
Cash Flows from Financing Activities:
Proceeds from credit agreements	20,000	148,500	316,900
Proceeds from stock issuance, net	79	37,151	40,195
Principal payments on credit agreements	(5,327)	(23,251)	(339,900)
Debt issuance costs	(4,071)	(7,302)	(12,777)
Payments on finance lease obligations	(8,170)	(12,040)	(9,714)
Proceeds from exercise of stock options	0	0	421
Acquisition of non-controlling interests	(1,489)	(1,130)	0
Acquisition of common stock for income tax withholdings	(312)	(488)	(235)
Other, net	(65)	110	(345)
Net cash provided by (used in) financing activities	645	141,550	(5,455)
Effect of exchange rates on cash and cash equivalents	(181)	5	130
Net (decrease) increase in cash and cash equivalents	(6,174)	3,782	3,652
Cash and cash equivalents at beginning of period	17,823	14,041	10,389
Cash and cash equivalents at end of period	11,649	17,823	14,041
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	62,690	60,329	37,692
Additions to property and equipment included in accounts payable	$ 4,474	$ 4,266	$ 3,946