Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	$ 4,452	$ 3,497	$ 6,493	$ 6,050
Other comprehensive income:
Foreign currency translation adjustments	2,075	(1,519)	750	(3,690)
Total comprehensive income	6,527	1,978	7,243	2,360
Less: Comprehensive income attributable to the noncontrolling interest	25	10	29	120
Total comprehensive income attributable to CDI	$ 6,502	$ 1,968	$ 7,214	$ 2,240