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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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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5086-111524 + Details
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