Commitments And Contingent Liabilities (Schedule of Off Balance Sheet Risks) (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Commitments To Originate
Commitments And Contingencies Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	$ 1,055,858
Commitments To Originate Fixed-Rate Mortgage Loans
Commitments And Contingencies Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	469,041
Commitments To Originate Adjustable-Rate Mortgage Loans
Commitments And Contingencies Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	419,411
Commitments To Originate Equity Loans and Lines of Credit Including Bridge Loans
Commitments And Contingencies Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	167,406
Unfunded Commitments
Commitments And Contingencies Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	2,413,746
Unfunded Commitments Equity Lines of Credit
Commitments And Contingencies Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	2,386,619
Unfunded Commitments Construction Loans
Commitments And Contingencies Off-balance Sheet Risks, Disclosure Information [Line Items]
Total	$ 27,127