Business Segments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segments	Sep. 30, 2014 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segments			2
Number of reportable segments | segments			2
Business segments, information about operations
Operating revenues	$ 121,968	$ 134,121	$ 365,486	$ 407,158
Operating income (loss)	(205,438)	10,540	(194,366)	26,106
Interest expense	1,339	716	3,463	2,153
Interest income	(46)	(75)	(92)	(204)
Loss on sale			9,501	0
Other, net	(575)	(581)	536	1,228
Income (loss) from operations before income taxes	(206,156)	10,480	(207,774)	22,929
Operating Segments | Customer Interaction
Business segments, information about operations
Operating revenues	108,784	121,078	327,275	367,133
Operating income (loss)	(208,524)	7,601	(201,956)	18,743
Operating Segments | Trillium Software
Business segments, information about operations
Operating revenues	13,184	13,043	38,211	40,025
Operating income (loss)	3,502	3,318	11,082	9,662
Corporate, Non-Segment
Business segments, information about operations
Operating income (loss)	$ (416)	$ (379)	$ (3,492)	$ (2,299)