Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenue	$ 220,260	$ 244,662	$ 680,477	$ 748,941
Cost of services	179,727	197,835	554,574	608,697
Gross profit	40,533	46,827	125,903	140,244
Operating and administrative expenses	43,675	46,853	139,037	137,570
Charges	3,478	566	3,767	613
Impairment	0	21,537	0	21,537
Loss on disposition of business interests	11,301	0	11,301	310
Operating profit	(17,921)	(22,129)	(28,202)	(19,786)
Other income (expense), net	(112)	683	(713)	599
Income before income taxes	(18,033)	(21,446)	(28,915)	(19,187)
Income tax expense	(215)	(1,244)	1,204	785
Net income	(17,818)	(20,202)	(30,119)	(19,972)
Less: Income attributable to the noncontrolling interest	0	0	0	(83)
Net income attributable to CDI	$ (17,818)	$ (20,202)	$ (30,119)	$ (19,889)
Earnings per common share:
Basic (per share)	$ (0.96)	$ (1.03)	$ (1.57)	$ (1.01)
Diluted (per share)	$ (0.96)	$ (1.03)	$ (1.57)	$ (1.01)