Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	$ 5,441	$ 4,566	$ 11,934	$ 10,616
Other comprehensive income:
Foreign currency translation adjustments	(3,526)	1,985	(2,776)	(1,705)
Total comprehensive income	1,915	6,551	9,158	8,911
Less: Comprehensive income attributable to the noncontrolling interest	18	26	47	146
Total comprehensive income attributable to CDI	$ 1,897	$ 6,525	$ 9,111	$ 8,765