Loss Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income (Loss) Attributable to Parent [Abstract]
Net loss from continuing operations	$ (20,784)	$ (13,513)	$ (21,887)	$ (9,129)
Net income attributable to noncontrolling interests	20	4	35	4
Net loss attributable to Ciber, Inc. from continuing operations	(20,804)	(13,517)	(21,922)	(9,133)
Loss from discontinued operations, net of income tax	(47)	(952)	(477)	(5,489)
NET LOSS ATTRIBUTABLE TO CIBER, INC.	$ (20,851)	$ (14,469)	$ (22,399)	$ (14,622)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic and diluted weighted average shares outstanding (in shares)	78,121	75,070	77,291	74,611
Continuing operations (in dollars per share)	$ (0.27)	$ (0.18)	$ (0.28)	$ (0.12)
Discontinued operations (in dollars per share)	$ 0.00	$ (0.01)	$ (0.01)	$ (0.08)
Basic and diluted loss per share attributable to Ciber, Inc. (in dollars per share)	$ (0.27)	$ (0.19)	$ (0.29)	$ (0.20)
Anti-dilutive securities omitted from the calculation (in shares)	3,738	6,541	3,492	6,088