Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (6,450)	$ (48,216)	$ (81,400)	$ (149,929)
Other comprehensive income (loss):
Foreign currency translation adjustment	(4,390)	(11,274)	(5,617)	(8,584)
Total other comprehensive income (loss)	(4,390)	(11,274)	(5,617)	(8,584)
Total comprehensive income (loss)	(10,840)	(59,490)	(87,017)	(158,513)
Less: Comprehensive (income) loss attributable to the noncontrolling interest	(238)	(9)	(604)	(529)
Comprehensive income (loss) attributable to inVentiv Health, Inc.	$ (11,078)	$ (59,499)	$ (87,621)	$ (159,042)