Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid-In-Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total CDI Shareholders' Equity	Non-Controlling Interest
Beginning balance at Dec. 31, 2013	$ 285,174	$ 2,196	$ (52,487)	$ 70,104	$ 265,207	$ (712)	$ 284,308	$ 866
Beginning balance (shares) at Dec. 31, 2013		21,958
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to CDI	2,037				2,037		2,037
Net income	2,041							4
Translation adjustments	(1,325)					(1,325)	(1,325)	0
Share-based compensation expense	575			575			575
Reclassification of equity awards from liabilities, net	115			115			115
Vesting of equity awards (shares)		59
Vesting of equity awards	0	6		(6)			0
Common shares withheld for taxes (shares)		(20)
Common shares withheld for taxes	(361)	(2)		(359)			(361)
Cash dividends paid	(2,536)				(2,536)		(2,536)
Ending balance at Mar. 31, 2014	283,683	2,200	(52,487)	70,429	264,708	(2,037)	282,813	870
Ending balance (shares) at Mar. 31, 2014		21,997
Beginning balance at Dec. 31, 2014	274,353	2,208	(52,487)	72,023	258,113	(6,207)	273,650	703
Beginning balance (shares) at Dec. 31, 2014		22,084
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to CDI	470						470
Net income	387							(83)
Translation adjustments	(4,582)					(4,680)	(4,680)	98
Share-based compensation expense	537			537			537
Reclassification of equity awards from liabilities, net	174			174			174
Vesting of equity awards (shares)		39
Vesting of equity awards	0	4		(4)			0
Common shares withheld for taxes (shares)		(15)
Common shares withheld for taxes	(257)	(1)		(256)			(257)
Disposition of controlling interest	(718)							(718)
Cash dividends paid	(2,554)				(2,554)		(2,554)
Ending balance at Mar. 31, 2015	$ 267,340	$ 2,211	$ (52,487)	$ 72,474	$ 256,029	$ (10,887)	$ 267,340	$ 0
Ending balance (shares) at Mar. 31, 2015		22,108