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Fair Value - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Allowance for credit losses | $ 300,555,000 | $ 288,003,000 | $ 300,555,000 | $ 288,003,000 | $ 298,711,000 | $ 303,671,000 | $ 280,507,000 | $ 107,341,000
Provision for credit losses | 14,787,000 | 9,165,000 | 28,224,000 | 117,901,000 |  |  |  |
Other real estate owned property write-downs | 100,000 | 100,000 | 100,000 | 300,000 |  |  |  |
Valuation allowance for loan servicing rights with impairments | 0 |  | 0 |  |  |  |  |
Valuation allowance for loan servicing rights with impairments, impairments (recoveries) during period | 0 | 0 | $ 0 | 0 |  |  |  |
Past due period of mortgage loans held for sale |  |  | 90 days |  |  |  |  |
Interest income for residential loans held for sale | 300,000 | 700,000 | $ 500,000 | 1,200,000 |  |  |  |
Fair Value on Non-recurring Basis |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Other real estate | 1,600,000 |  | 1,600,000 |  |  |  |  |
Impaired Commercial and Commercial Real Estate Loans |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |  |  |  |
Principal amount of impaired commercial and commercial real estate loans | 127,900,000 |  | 127,900,000 |  |  | 92,000,000 |  |
Allowance for credit losses | 29,400,000 |  | 29,400,000 |  |  | $ 21,500,000 |  |
Provision for credit losses | $ 7,900,000 | $ 12,800,000 | $ 19,800,000 | $ 28,600,000 |  |  |  |

X
- Definition Amount of write downs on foreclosed assets measured on a non-recurring basis during the period, including other real estate owned and other repossessed property. + References No definition available. + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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- Definition Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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- Definition Amount of increase (decrease) in the valuation allowance for impairment of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer from expenses (recoveries) recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-4 + Details
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