Fair Value Measurement (Quantitative Information About Significant Unobservable Inputs For MSRs) (Details) - Mortgage Servicing Rights [Member] - Level 3 [Member] - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Servicing Fees [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value measurement of unobservable input (as a percent)	0.25	0.25
Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value measurement of unobservable input (as a percent)	9.00	9.00
Prepayment Rate (CPR) [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value measurement of unobservable input (as a percent)	8.00	6.52