Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net loss	$ (5,113)	$ (189)
Adjustments to reconcile net loss including non-controlling interests to net cash provided by operating activities:
Depreciation and amortization of property and equipment	52,750	56,769
Amortization of intangible assets	3,365	2,507
Impairment loss and loss on disposal of fixed assets and intangible assets held for sale, net	277	198
Stock-based compensation	6,434	9,227
Amortization of deferred financing costs and debt discount, net of amounts capitalized	6,554	0
Non-cash operating lease cost	1,675	0
Gains and amortization of premiums/discounts for marketable securities	(522)	0
Change in fair value of contingent consideration	(961)	0
Bad debt expense	187	301
Changes in operating assets and liabilities:
Accounts receivable	(6,974)	(1,596)
Prepaid expenses and other assets	946	(209)
Accounts payable	532	2,041
Accrued expenses and other liabilities	5,394	3,557
Deferred revenue	18,523	(1,772)
Operating lease liabilities	(1,996)	0
Net cash provided by operating activities	81,071	70,834
Cash flows from investing activities
Purchases of marketable securities	(73,323)	0
Proceeds from maturities of marketable securities	37,293	0
Purchases of property and equipment	(101,455)	(72,531)
Payments for asset acquisitions	0	(22,052)
Net cash used in investing activities	(137,485)	(94,583)
Cash flows from financing activities
Debt issuance costs	(1,815)	0
Proceeds from credit facility	3,500	15,000
Principal payments on credit facility	(584)	(656)
Payments of acquisition related consideration	(3,027)	0
Proceeds from exercise of stock options	154	9,764
Repurchase of common stock for retirement	(747)	0
Payments of finance leases and notes payable	(5,162)	(4,362)
Payments of withholding tax on net issuance of restricted stock units	(34,123)	(8,901)
Payments to non-controlling interests	(1,003)	(614)
Net cash (used in) provided by financing activities	(42,807)	10,231
Effect of exchange rates on cash	(9)	9
Net decrease in cash, cash equivalents, and restricted cash	(99,230)	(13,509)
Cash and cash equivalents at beginning of period	149,412	26,685
Cash, cash equivalents, and restricted cash at end of period	50,182	13,176
Supplemental disclosure of non-cash investing and financing activities
Property and equipment costs in accounts payable, accrued expenses and other liabilities	35,515	35,458
Purchase of equipment and prepaid maintenance services under capital financing arrangements	0	5,068
Capitalized stock-based compensation included in property and equipment costs	689	600
Financed sale of intangible assets held for sale	$ 300	$ 0