Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Mar. 16, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Apr. 14, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill		$ 218,972		$ 218,972			$ 398,164
Goodwill, Impairment Loss		209,938	$ 0	209,938	$ 0
Income tax (benefit)		(36,800)		(36,800)
Goodwill, Impairment Loss, Net of Tax				173,100
Customer Interaction
Goodwill [Line Items]
Goodwill		$ 69,699		69,699			$ 248,891
Goodwill, Impairment Loss				$ 209,938
Customer Interaction | B2B research business
Goodwill [Line Items]
Goodwill						$ 11,100
3Q Digital Inc
Goodwill [Line Items]
Goodwill	$ 41,845
Period for achievement for revenue performance goals	3 years