Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income (loss)	$ 16,046	$ (47,843)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	23,115	20,096
Amortization of deferred financing costs and debt discount	340	354
Equity-based compensation	13,349	74,997
Excess tax benefits from equity awards	(703)
Extinguishment of debt		638
Provision for doubtful accounts	51	321
Loss (gain) on disposal of property and equipment	20	(31)
Deferred income taxes	(2,430)	(4,913)
Changes in assets and liabilities:
Accounts receivable	2,522	(3,508)
Unbilled revenue	(2,468)	(542)
Prepaid expenses and other assets	(354)	(2,911)
Accounts payable	(1,640)	(2,834)
Accrued payroll and related liabilities	(4,335)	(3,781)
Accrued expenses and other liabilities	(40)	36
Deferred revenue	3,992	10,589
Income taxes, net	4,617	(3,137)
Net cash provided by operating activities	52,082	37,531
Investing activities
Acquisition of business, net of cash acquired	(16,744)
Investment in unconsolidated affiliate	(2,000)
Capital expenditures	(12,231)	(15,179)
Net cash used in investing activities	(30,975)	(15,179)
Financing activities
Payments on long-term debt	(4,626)	(225,140)
Deferred financing payments		(50)
Payments on capital lease obligations	(2,308)	(2,190)
Proceeds from sale of equity interests		100
Purchases of equity interests	(787)	(731)
Taxes paid for net settlements of restricted stock vesting	(2,941)	(10,858)
Excess tax benefits from equity awards	703
Distribution payments		(8,500)
Proceeds from the issuance of common stock in initial public offering, net of fees		237,977
Net cash used in financing activities	(9,959)	(9,392)
Net increase in cash	11,148	12,960
Cash at beginning of period	35,235	6,962
Cash at end of period	46,383	19,922
Supplemental disclosure of cash flow information
Cash paid during the period for interest	2,151	8,006
Cash paid during the period for income taxes	10,901	6,635
Disposal of property and equipment acquired through capital leases		283
Property and equipment acquired through capital leases		2,156
Capital expenditures in accounts payable	$ 2,670	2,069
Initial public offering related costs in accounts payable		$ 3,426