Assets and Liabilities Subject to Enforceable Master Netting Arrangements (Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Repurchase Agreements [Member]
Gross Amounts of Recognized (Assets)/Liabilities	$ 49,160	$ 48,728
Gross Amounts Offset in the Statement of Condition
Net Amounts of (Assets)/Liabilities Presented in the Statement of Condition	49,160	48,728
Gross Amounts Not Offset in the Statment of Condition: Financial Instruments	(49,160)	(48,728)
Gross Amounts Not Offset in the Statment of Condition: Cash Collateral Pledged
Net amount
Interest Rate Swap Agreements [Member]
Gross Amounts of Recognized (Assets)/Liabilities	1,320	133
Gross Amounts Offset in the Statement of Condition
Net Amounts of (Assets)/Liabilities Presented in the Statement of Condition	1,320	133
Gross Amounts Not Offset in the Statment of Condition: Financial Instruments	(1,320)	(133)
Gross Amounts Not Offset in the Statment of Condition: Cash Collateral Pledged
Net amount