Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net loss	$ (13,973)	$ (5,113)
Adjustments to reconcile net loss including non-controlling interests to net cash provided by operating activities:
Depreciation and amortization of property and equipment	58,198	52,750
Amortization of intangible assets	3,276	3,365
Impairment loss, loss on disposal of fixed assets and intangible assets held for sale, net, and other	15	277
Stock-based compensation	5,534	6,434
Amortization of deferred financing costs and debt discount, net of amounts capitalized	6,776	6,554
Non-cash operating lease cost	1,762	1,675
Gains and amortization of premiums/discounts for marketable securities	2	(522)
Change in fair value of contingent consideration		(961)
Bad debt expense	28	187
Change in deferred income taxes	(12)	0
Changes in operating assets and liabilities:
Accounts receivable	14,180	(6,974)
Prepaid expenses and other assets	(5,116)	946
Accounts payable	(336)	532
Accrued expenses and other liabilities	(6,071)	5,394
Deferred revenue	2,881	18,523
Operating lease liabilities	(2,214)	(1,996)
Net cash provided by operating activities	64,930	81,071
Cash flows from investing activities
Purchases of marketable securities	(15,032)	(73,323)
Proceeds from maturities of marketable securities	47,665	37,293
Purchases of property and equipment	(85,819)	(101,455)
Net cash used in investing activities	(53,186)	(137,485)
Cash flows from financing activities
Debt issuance costs		(1,815)
Proceeds from credit facility	100,000	3,500
Principal payments on credit facility	(100,584)	(584)
Payments of acquisition related consideration		(3,027)
Proceeds from exercise of stock options	447	154
Repurchase of common stock for retirement		(747)
Payments of finance leases and notes payable	(3,548)	(5,162)
Payments of withholding tax on net issuance of restricted stock units	(1,350)	(34,123)
Payments to non-controlling interest	(262)	(1,003)
Net cash used in financing activities	(5,297)	(42,807)
Effect of exchange rates on cash	124	(9)
Net increase (decrease) in cash and cash equivalents	6,571	(99,230)
Cash and cash equivalents at beginning of period	40,401	149,412
Cash and cash equivalents at end of period	46,972	50,182
Supplemental disclosure of non-cash investing and financing activities
Property and equipment costs included in accounts payable, accrued expenses and other liabilities	30,046	35,515
Capitalized stock-based compensation included in property and equipment costs	497	689
Financed sale of intangible assets held for sale	$ 224	$ 300