Residential Mortgage Servicing Rights (Sensitivity Analysis of Current Fair Value to Changes in Discount and Prepayment Speed Assumptions) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Transfers and Servicing [Abstract]
Effect on fair value of a 10% adverse change	$ (5,466)	$ (4,965)
Effect on fair value of a 20% adverse change	(10,490)	(9,547)
Effect on fair value of a 100 basis point adverse change	(4,509)	(4,539)
Effect on fair value of a 200 basis point adverse change	$ (8,680)	$ (8,771)