Consolidated Statements Of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Total CDI Shareholders' Equity [Member]	Common Stock	Treasury Stock	Additional Paid-In-Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Beginning balance (shares) at Dec. 31, 2013			21,958
Beginning balance at Dec. 31, 2013	$ 285,174	$ 284,308	$ 2,196	$ (52,487)	$ 70,104	$ 265,207	$ (712)	$ 866
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,017	3,082				3,082		(65)
Translation adjustments	(5,593)	(5,495)					(5,495)	(98)
Share-based compensation expense	2,708	2,708			2,708
Reclassification of equity awards from liabilities, net	(279)	(279)			(279)
Vesting and exercise of equity awards (shares)			155
Vesting and exercise of equity awards	0	0	$ 16		(16)
Common shares withheld for taxes (shares)			(29)
Common shares withheld for taxes	(498)	(498)	$ (4)		(494)
Cash dividends paid	(10,176)	(10,176)				(10,176)
Ending balance (shares) at Dec. 31, 2014			22,084
Ending balance at Dec. 31, 2014	274,353	273,650	$ 2,208	(52,487)	72,023	258,113	(6,207)	703
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(37,086)	(37,003)				(37,003)		(83)
Translation adjustments	(7,830)	(7,928)					(7,928)	98
Share-based compensation expense	2,355	2,355			2,355
Reclassification of equity awards from liabilities, net	706	706			706
Vesting and exercise of equity awards (shares)			98
Vesting and exercise of equity awards	0	0	$ 10		(10)
Common shares withheld for taxes (shares)			(19)
Common shares withheld for taxes	(302)	(302)	$ (2)		(300)
Disposition of controlling interest	(718)							(718)
Cash dividends paid	(10,235)	(10,235)				(10,235)
Ending balance (shares) at Dec. 31, 2015			22,163
Ending balance at Dec. 31, 2015	221,243	221,243	$ 2,216	(52,487)	74,774	210,875	(14,135)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(31,573)	(31,573)				(31,573)		0
Translation adjustments	4,592	4,592					4,592	0
Share-based compensation expense	2,242	2,242			2,242
Reclassification of equity awards from liabilities, net	15	15			15
Vesting and exercise of equity awards (shares)			210
Vesting and exercise of equity awards	0	0	$ 21		(21)
Common shares withheld for taxes (shares)			(47)
Common shares withheld for taxes	(288)	(288)	$ (4)		(284)
Stock Repurchased During Period, Value	(7,255)	(7,255)		(7,255)
Ending balance (shares) at Dec. 31, 2016			22,326
Ending balance at Dec. 31, 2016	$ 188,976	$ 188,976	$ 2,233	$ (59,742)	$ 76,726	$ 179,302	$ (9,543)	$ 0