Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	$ 12,948	$ 19,433	$ 15,000
Other comprehensive income (loss):
Foreign currency translation adjustments	(2,220)	1,843	(473)
Total comprehensive income	10,728	21,276	14,527
Less: Comprehensive income attributable to the noncontrolling interest	57	353	111
Total comprehensive income attributable to CDI	$ 10,671	$ 20,923	$ 14,416