Mortgage Servicing Rights (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Transfers and Servicing of Financial Assets [Abstract]
Residential mortgage loans serviced for third parties	$ 2,800,000,000		$ 2,900,000,000
Servicing income, including late and ancillary fees	$ 1,900,000	$ 2,000,000