Goodwill and Identifiable Intangible Assets Goodwill and Identifiable Intangible Assets - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016 reporting_unit	Dec. 31, 2015 USD ($)
Goodwill [Line Items]
Number of reporting units | reporting_unit	5
Tax Lien Business [Member]
Goodwill [Line Items]
Goodwill write-down | $		$ 49.3