CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended					9 Months Ended	12 Months Ended		24 Months Ended
	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (21)	$ 3,448	$ (8,576)	$ (59)		$ (14,336)	$ 13,425	$ (8,673)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation						4,610	7,442	6,379
Amortization						56,422	50,672	63,142
Stock-based compensation expense						5,423	9,815	22,324
Amortization of debt issuance costs and discount						2,064	2,576	2,687
Loss on extinguishment of debt						0	10,726	0
Deferred income tax benefit						(9,557)	(9,006)	(12,690)
Impairment of goodwill			9,300			0	0	9,313	$ 9,313
Other						(225)	(1,019)	(242)
Changes in assets and liabilities:
Accounts receivable and unbilled, net						(1,103)	(13,727)	337
Prepaid expenses and other current assets						(846)	(3,661)	(181)
Accounts payable						558	691	2,481
Accrued expenses						10,987	4,516	320
Pre-funded study costs						299	5,400	9,981
Advanced billings						5,995	14,723	(7,002)
Other assets and liabilities, net						1,704	(841)	(2,306)
Net cash provided by operating activities						61,995	91,732	85,870
CASH FLOWS FROM INVESTING ACTIVITIES:
Property and equipment expenditures						(4,225)	(13,537)	(6,465)
Acquisition of Predecessor, net of cash and restricted cash received						(901,805)	0	0
Other						38	115	33
Net cash used in investing activities						(905,992)	(13,422)	(6,432)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment for common stock issuance costs						0	(2,719)	0
Proceeds from stock option exercises						0	537	250
Excess tax benefit from stock-based compensation						809	25	0
Proceeds from issuance of debt, net of original issue discount						527,350	164,506	0
Payment of debt						(25,217)	(390,060)	(116,055)
Proceeds from revolving loan						1,575	0	0
Payment on revolving loan						(1,575)	0	0
Debt issuance costs						(15,487)	(1,802)	0
Payment of deemed landlord liability						(1,284)	(1,525)	(1,292)
Payment on debt extinguishment						0	(548)	0
Proceeds from common stock issued, net						414,000	173,578	608
Net cash (used in) provided by financing activities						900,171	(58,008)	(116,489)
EFFECT OF EXCHANGE RATES ON CASH, CASH EQUIVALENTS, AND RESTRICTED CASH						(785)	(632)	(601)
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH						55,389	19,670	(37,652)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH — Beginning of period		$ 17,737		$ 55,389		0	17,737	55,389	55,389
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH — End of period	$ 37,407		$ 17,737		$ 0	55,389	37,407	17,737	$ 37,407
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION—
Cash paid during the period for income taxes						4,513	17,654	10,552
Cash paid during the period for interest						21,060	16,895	24,435
Acquisition of property and equipment—non-cash						153	$ 1,687	$ 176
Predecessor
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)					(1,236)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation					1,832
Amortization					5,199
Stock-based compensation expense					7,340
Amortization of debt issuance costs and discount					371
Loss on extinguishment of debt					0
Deferred income tax benefit					300
Impairment of goodwill					0
Other					(721)
Changes in assets and liabilities:
Accounts receivable and unbilled, net					(10,543)
Prepaid expenses and other current assets					(4,617)
Accounts payable					13,708
Accrued expenses					(4,957)
Pre-funded study costs					1,561
Advanced billings					6,330
Other assets and liabilities, net					(1,360)
Net cash provided by operating activities					13,207
CASH FLOWS FROM INVESTING ACTIVITIES:
Property and equipment expenditures					(1,090)
Acquisition of Predecessor, net of cash and restricted cash received					0
Other					263
Net cash used in investing activities					(827)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment for common stock issuance costs					0
Proceeds from stock option exercises					0
Excess tax benefit from stock-based compensation					5,270
Proceeds from issuance of debt, net of original issue discount					0
Payment of debt					(23,073)
Proceeds from revolving loan					0
Payment on revolving loan					0
Debt issuance costs					0
Payment of deemed landlord liability					(165)
Payment on debt extinguishment					0
Proceeds from common stock issued, net					0
Net cash (used in) provided by financing activities					(17,968)
EFFECT OF EXCHANGE RATES ON CASH, CASH EQUIVALENTS, AND RESTRICTED CASH					(25)
INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH					(5,613)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH — Beginning of period					25,106	$ 19,493
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH — End of period					19,493
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION—
Cash paid during the period for income taxes					125
Cash paid during the period for interest					2,961
Acquisition of property and equipment—non-cash					$ 312