Selected Quarterly Financial Information (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Selected Quarterly Financial Information [Abstract]
Revenues	$ 222,300	$ 215,057	$ 220,395	$ 219,541	$ 219,537	$ 211,216	$ 216,264	$ 218,580	$ 877,293	$ 865,597	$ 888,386
Gross profit	57,731	54,062	56,038	55,226	57,218	53,420	57,514	55,326	223,057	223,478
Operating income (loss) from continuing operations	4,167	(13,469)	5,035	4,786	(3,373)	4,297	4,650	7,094	519	12,668	(10,402)
Net income (loss) from continuing operations	1,522	(13,513)	2,935	1,449	(5,976)	195	422	1,286	(7,607)	(4,073)	(52,351)
Loss from discontinued operations, net of income tax	(1,435)	(952)	(4,555)	18	(119)	(9,510)	(297)	(83)	(6,924)	(10,009)	(14,881)
Net income (loss) attributable to Ciber, Inc.	$ 102	$ (14,469)	$ (1,766)	$ 1,613	$ (6,240)	$ (9,449)	$ (81)	$ 1,143	$ (14,520)	$ (14,627)	$ (67,261)
Basic and diluted earnings (loss) per share attributable to Ciber, Inc.:
Continuing operations (in dollars per share)	$ 0.02	$ (0.18)	$ 0.04	$ 0.02	$ (0.08)	$ 0.00	$ 0.00	$ 0.02	$ (0.10)	$ (0.06)	$ (0.73)
Discontinued operations (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.06)	$ 0.00	$ 0.00	$ (0.13)	$ 0.00	$ 0.00	$ (0.09)	$ (0.14)	$ (0.21)
Basic and diluted loss per share attributable to Ciber, Inc. (in dollars per share)	$ 0.00	$ (0.19)	$ (0.02)	$ 0.02	$ (0.08)	$ (0.13)	$ 0.00	$ 0.02	$ (0.19)	$ (0.20)	$ (0.94)