Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net loss	$ (18,578)	$ (12,378)
Adjustments to reconcile net loss including non-controlling interests to net cash provided by operating activities:
Depreciation and amortization of property and equipment	27,899	19,650
Amortization of intangible assets	2,709	2,812
Impairment loss	191	406
Stock-based compensation	6,190	5,210
Excess tax benefits from stock-based compensation		(60)
Change in fair value of contingent consideration	(114)	(358)
Change in deferred income taxes	285	277
Changes in operating assets and liabilities:
Accounts receivable	(22,548)	(7,609)
Prepaid expenses and other assets	(2,810)	(1,246)
Accounts payable	2,422	1,234
Accrued expenses and other liabilities	5,039	(1,118)
Deferred revenue	49,165	11,818
Net cash provided by operating activities	49,850	18,638
Cash flows from investing activities
Decrease in restricted cash		430
Purchases of marketable securities		(27,156)
Proceeds from sales of marketable securities	1,614	42,857
Purchases of property and equipment	(63,429)	(55,021)
Payments for business acquisition		(147)
Net cash used in investing activities	(61,815)	(39,037)
Cash flows from financing activities
Proceeds from credit facility	20,000
Principal payments on debt	(5,438)
Excess tax benefits from stock-based compensation		60
Proceeds from exercise of stock options	1,247	860
Payments of capital leases and notes payable	(427)	(544)
Payment of other acquisition related consideration	(17)	(1,255)
Payments of withholding tax on net issuance of restricted stock units	(1,984)	(1,413)
Payments to non-controlling interests	(500)	(623)
Purchase of non-controlling interests	(1,150)
Net cash provided by (used in) financing activities	11,731	(2,915)
Effect of exchange rates on cash	(59)	6
Net decrease in cash and cash equivalents	(293)	(23,308)
Cash and cash equivalents at beginning of period	8,849	27,338
Cash and cash equivalents at end of period	8,556	4,030
Supplemental disclosure of non-cash investing and financing activities
Property and equipment costs in accounts payable, accrued expenses and other liabilities	54,079	13,272
Acquisition of equipment under capital lease	$ 3,099	$ 361