Securities Held to Maturity (Summary of Credit Rating) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-maturity	$ 97,116	$ 98,060
Marketable Securities [Line Items]
Debt Securities, Held-to-maturity	97,116	98,060
Standard & Poor's, AAA Rating
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-maturity	12,965	15,450
Marketable Securities [Line Items]
Debt Securities, Held-to-maturity	12,965	15,450
Standard & Poor's, AA Rating
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-maturity	76,714	75,119
Marketable Securities [Line Items]
Debt Securities, Held-to-maturity	76,714	75,119
Standard & Poor's, A Rating
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-maturity	7,437	7,491
Marketable Securities [Line Items]
Debt Securities, Held-to-maturity	7,437	7,491
Standard & Poor's, BBB Rating
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-maturity	0	0
Marketable Securities [Line Items]
Debt Securities, Held-to-maturity	0	0
Standard & Poor's, Below Investment Grade Rating
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-maturity	0	0
Marketable Securities [Line Items]
Debt Securities, Held-to-maturity	$ 0	$ 0