Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (29,988)	$ (52,994)	$ (74,950)	$ (101,713)
Other comprehensive income (loss):
Foreign currency translation adjustment	4,218	2,552	(1,227)	2,690
Total other comprehensive income (loss)	4,218	2,552	(1,227)	2,690
Total comprehensive income (loss)	(25,770)	(50,442)	(76,177)	(99,023)
Less: Comprehensive (income) loss attributable to the noncontrolling interest	(243)	6	(366)	(520)
Comprehensive income (loss) attributable to inVentiv Health, Inc.	$ (26,013)	$ (50,436)	$ (76,543)	$ (99,543)