Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Income (Loss) Attributable to Parent [Abstract]
Net income (loss) from continuing operations	$ (132)	$ (20,784)	$ 5,237	$ (21,887)
Net income (loss) attributable to noncontrolling interests	24	20	16	35
Net income (loss) attributable to Ciber, Inc. from continuing operations	(156)	(20,804)	5,221	(21,922)
Loss from discontinued operations, net of income tax	(200)	(47)	(258)	(477)
NET EARNINGS (LOSS) ATTRIBUTABLE TO CIBER, INC.	$ (356)	$ (20,851)	$ 4,963	$ (22,399)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted average shares outstanding (in shares)	79,206	78,121	78,938	77,291
Dilutive effect of employee stock plans (in shares)	0	0	787	0
Diluted weighted average shares outstanding (in shares)	79,206	78,121	79,725	77,291
Continuing operations (in dollars per share)	$ 0.00	$ (0.27)	$ 0.07	$ (0.28)
Discontinued operations (in dollars per share)	0.00	0.00	(0.01)	(0.01)
Basic and diluted earnings (loss) per share attributable to Ciber, Inc. (in dollars per share)	$ 0.00	$ (0.27)	$ 0.06	$ (0.29)
Anti-dilutive securities omitted from the calculation (in shares)	4,141	3,738	3,137	3,492