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Fair Value Assets and Liabilities measured on nonrecurring basis (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans carried at fair value | $ 2,497,000 | $ 5,773,000
Loans Receivable, Fair Value Disclosure | 7,206,670,000 | 6,926,294,000
Servicing Asset at Fair Value, Amount | 900,000 | 1,700,000
Other Assets, Fair Value Disclosure | 7,200,851,000 | 6,918,326,000
Other Repossessed Assets | 1,100,000 | 605,000
Nonrecurring basis |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 2,497,000 | 5,773,000
Servicing Asset at Fair Value, Amount | 866,000 | 1,717,000
Other Assets, Fair Value Disclosure | 938,000 | 0
Nonrecurring basis | Residential real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 182,000 | 200,000
Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 2,315,000 | 5,573,000
Other Assets, Fair Value Disclosure | 938,000 |
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 0 | 0
Level 1 | Nonrecurring basis |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other Assets, Fair Value Disclosure | 0 | 0
Level 1 | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other Assets, Fair Value Disclosure | 0 |
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 3,322,000 | 2,195,000
Level 2 | Nonrecurring basis |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing Asset at Fair Value, Amount | 866,000 | 1,717,000
Other Assets, Fair Value Disclosure | 0 | 0
Level 2 | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other Assets, Fair Value Disclosure | 0 |
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans carried at fair value | 2,497,000 | 5,773,000
Loans Receivable, Fair Value Disclosure | 7,203,348,000 | 6,924,099,000
Other Assets, Fair Value Disclosure | 7,200,851,000 | 6,918,326,000
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 2,497,000 | 5,773,000
Other Assets, Fair Value Disclosure | 938,000 | 0
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis | Residential real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 182,000 | 200,000
Fair Value, Inputs, Level 3 [Member] | Nonrecurring basis | Commercial Real Estate Portfolio Segment [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans Receivable, Fair Value Disclosure | 2,315,000 | $ 5,573,000
Other Assets, Fair Value Disclosure | $ 938,000 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Publisher FASB -URI https://asc.fasb.org//310-10/tableOfContent + Details
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- Definition Carrying amount as of the balance sheet date of assets other than real property that were received in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11 -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 + Details
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