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Short-Term Debt and Long-term Debt (Narrative) (Details) - USD ($)	1 Months Ended		12 Months Ended
	Nov. 30, 2020	Oct. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Loans pledged as collateral			$ 733,300,000	$ 814,600,000
Securities pledged as collateral				0	$ 0
Unamortized prepayment penalties			$ 2,100,000	2,600,000
Maximum ratio of debt to total assets under debt covenant			50.00%
Maximum total debt under debt covenant			$ 1,484,000,000
Repayments of Federal Home Loan Bank of New York Advances			130,000,000	142,800,000
Net proceeds from Federal Home Loan Bank of New York Advances			10,000,000	88,161,000
FHLB Of New York Advance Due September 2022 [Member]
Debt Instrument [Line Items]
Repayments of Federal Home Loan Bank of New York Advances		$ 20,800,000
Fixed interest rate		3.10%
FHLB Of New York Advance Issued October 2020 [Member]
Debt Instrument [Line Items]
Fixed interest rate		0.59%
Net proceeds from Federal Home Loan Bank of New York Advances		$ 20,800,000
Debt term		5 years
Prepayment penalty		1.15%
FHLB Of New York Advance Due 2023 [Member]
Debt Instrument [Line Items]
Repayments of Federal Home Loan Bank of New York Advances	$ 25,000,000.0
Fixed interest rate	2.90%
FHLB Of New York Advance Issued November 2020 [Member]
Debt Instrument [Line Items]
Fixed interest rate	0.68%
Net proceeds from Federal Home Loan Bank of New York Advances	$ 25,000,000.0
Debt term	5 years
Prepayment penalty	1.25%
FHLB Advances Due In 2021 Through 2024 [Member]
Debt Instrument [Line Items]
Debt extinguished			$ 115,000,000.0
Weighted average interest rate			1.60%
Increase (decrease) in weighted average interest rate			(0.16%)
FHLB Of New York Advances Due In 2021 And 2022 [Member]
Debt Instrument [Line Items]
Debt extinguished				$ 47,000,000.0
Weighted average interest rate				2.24%
Increase (decrease) in weighted average interest rate				(0.12%)

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Contractual interest rate for funds borrowed, under the debt agreement.

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