Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014 segment	Jun. 30, 2014 segment	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Segments
Number of operating segments	2	2
Number of reportable segments	2
Business segments, information about operations
Impairment of other intangible assets			$ 2,750		$ 2,750
Operating revenues	134,121		134,973	407,158	407,430
Operating income	10,540		8,360	26,106	30,177
Interest expense	716		754	2,153	2,336
Interest income	(75)		(25)	(204)	(76)
Other, net	(581)		536	1,228	(600)
Income from continuing operations before income taxes	10,480		7,095	22,929	28,517
Operating Segments | Customer Interaction
Business segments, information about operations
Operating revenues	121,078		121,338	367,133	367,928
Operating income	7,601		5,559	18,743	22,600
Operating Segments | Customer Interaction | Aberdeen Business
Business segments, information about operations
Impairment of other intangible assets			2,800		2,800
Operating Segments | Trillium Software
Business segments, information about operations
Operating revenues	13,043		13,635	40,025	39,502
Operating income	3,318		3,931	9,662	10,969
Corporate, Non-Segment
Business segments, information about operations
Operating income	$ (379)		$ (1,130)	$ (2,299)	$ (3,392)