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Borrowings (Schedule of Advances to the Federal Home Loan Bank) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Maturity Schedule Of Federal Home Loan Bank Advances [Line Items] |  |
FHLB advances, carrying value of residential real estate and commercial loans pledged as collateral | $ 1,300,000 | $ 1,400,000
FHLB advances, securities pledged as collateral | 38 | 150
Federal Home Loan Bank Advances | $ 25,000 | $ 40,825
Long-term Debt [Member] |  |
Maturity Schedule Of Federal Home Loan Bank Advances [Line Items] |  |
Debt, Weighted Average Interest Rate | 0.98% | 1.87%
Short-term Debt |  |
Maturity Schedule Of Federal Home Loan Bank Advances [Line Items] |  |
Debt, Weighted Average Interest Rate | 0.34% | 1.28%
FHLBB Borrowing Maturing February 2020 | Long-term Debt [Member] |  |
Maturity Schedule Of Federal Home Loan Bank Advances [Line Items] |  |
Debt, Weighted Average Interest Rate |  | 1.87%
Federal Home Loan Bank Advances |  | $ 10,000
FHLBB Borrowing Maturing January 2020 | Short-term Debt |  |
Maturity Schedule Of Federal Home Loan Bank Advances [Line Items] |  |
Debt, Weighted Average Interest Rate |  | 1.79%
Federal Home Loan Bank Advances |  | $ 30,825
FHLBB Borrowing Maturing March 2025 |  |
Maturity Schedule Of Federal Home Loan Bank Advances [Line Items] |  |
Federal Home Loan Bank Advances | $ 25,000 |
FHLBB Borrowing Maturing March 2025 | Long-term Debt [Member] |  |
Maturity Schedule Of Federal Home Loan Bank Advances [Line Items] |  |
Debt, Weighted Average Interest Rate | 0.98% |
Federal Home Loan Bank Advances | $ 25,000 |

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- Definition Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions. + References No definition available. + Details
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- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for FHLB debt obligations, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
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