Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net Income (loss)	$ (18,639)	$ (44,962)
Other comprehensive income (loss):
Foreign currency translation adjustment	5,419	(5,445)
Total other comprehensive income (loss)	5,419	(5,445)
Total comprehensive income (loss)	(13,220)	(50,407)
Less: Comprehensive (income) loss attributable to the noncontrolling interest	(438)	(123)
Comprehensive income (loss) attributable to inVentiv Health, Inc.	$ (13,658)	$ (50,530)