Residential Mortgage Servicing Rights (Sensitivity Analysis of Current Fair Value to Changes in Discount and Prepayment Speed Assumptions) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Transfers and Servicing [Abstract]
Effect on fair value of a 10% adverse change	$ (5,494)	$ (5,337)
Effect on fair value of a 20% adverse change	(10,526)	(10,283)
Effect on fair value of a 100 basis point adverse change	(3,784)	(4,936)
Effect on fair value of a 200 basis point adverse change	$ (7,325)	$ (9,494)