Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Income (Loss) Attributable to Parent [Abstract]
Net income (loss) from continuing operations	$ 1,151	$ (5,169)	$ 5,369	$ (1,103)
Net income (loss) attributable to noncontrolling interests	(10)	10	(8)	15
Net income (loss) attributable to Ciber, Inc. from continuing operations	1,161	(5,179)	5,377	(1,118)
Loss from discontinued operations, net of income tax	(16)	(288)	(58)	(430)
NET EARNINGS (LOSS) ATTRIBUTABLE TO CIBER, INC.	$ 1,145	$ (5,467)	$ 5,319	$ (1,548)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted average shares outstanding (in shares)	78,880	77,301	78,804	76,877
Dilutive effect of employee stock plans (in shares)	921	0	866	0
Diluted weighted average shares outstanding (in shares)	79,801	77,301	79,670	76,877
Continuing operations (in dollars per share)	$ 0.01	$ (0.07)	$ 0.07	$ (0.01)
Discontinued operations (in dollars per share)	0.00	0.00	0.00	(0.01)
Basic and diluted earnings (loss) per share attributable to Ciber, Inc. (in dollars per share)	$ 0.01	$ (0.07)	$ 0.07	$ (0.02)
Anti-dilutive securities omitted from the calculation (in shares)	2,502	3,252	2,635	3,370