Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net loss	$ (14,630)	$ (17,180)
Adjustments to reconcile net loss including non-controlling interests to net cash provided by operating activities:
Depreciation and amortization of property and equipment	30,999	21,708
Amortization of intangible assets	1,821	1,727
Other	53	0
Impairment loss and loss on disposal of fixed assets, net	440	19
Stock-based compensation	7,332	6,684
Change in deferred income taxes	243	256
Changes in operating assets and liabilities:
Accounts receivable	15,975	(4,691)
Prepaid expenses and other assets	(553)	147
Accounts payable	(2,556)	(1,199)
Accrued expenses and other liabilities	5,630	3,642
Deferred revenue	2,599	44,554
Net cash provided by operating activities	47,353	55,667
Cash flows from investing activities
Purchases of property and equipment	(31,917)	(64,257)
Payments for asset acquisition	(1,150)	0
Net cash used in investing activities	(33,067)	(64,257)
Cash flows from financing activities
Proceeds from credit facility	0	5,000
Principal payments on credit facility	(10,656)	(438)
Debt issuance costs	0	(124)
Proceeds from exercise of stock options	3,624	1,784
Payments of capital leases and notes payable	(1,819)	(1,277)
Payments of withholding tax on net issuance of restricted stock units	(2,458)	(1,520)
Payments to non-controlling interest	(125)	(286)
Net cash (used in) provided by financing activities	(11,434)	3,139
Effect of exchange rates on cash	(16)	24
Net increase (decrease) in cash and cash equivalents	2,836	(5,427)
Cash and cash equivalents at beginning of period	19,485	14,718
Cash and cash equivalents at end of period	22,321	9,291
Supplemental disclosure of non-cash investing and financing activities
Property and equipment costs in accounts payable, accrued expenses and other liabilities	22,015	22,011
Purchase of equipment and prepaid maintenance services under capital financing arrangements	$ 1,976	$ 3,067