Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Goodwill [Roll Forward]
Balance at December 31, 2014			$ 398,164
Purchase consideration			41,845
Write-off related to disposition of assets			(11,099)
Impairment	$ (209,938)	$ 0	(209,938)	$ 0
Balance at September 30, 3015	218,972		218,972
Customer Interaction
Goodwill [Roll Forward]
Balance at December 31, 2014			248,891
Purchase consideration			41,845
Write-off related to disposition of assets			(11,099)
Impairment			(209,938)
Balance at September 30, 3015	69,699		69,699
Trillium Software
Goodwill [Roll Forward]
Balance at December 31, 2014			149,273
Purchase consideration			0
Write-off related to disposition of assets			0
Impairment			0
Balance at September 30, 3015	$ 149,273		$ 149,273