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Loans and Allowance for Credit Losses - Amortized cost basis of collateral-dependent loans (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | $ 7,228,731 | $ 6,990,633
Business or Other Assets |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 4,623 | 7,656
Business or Other Assets | Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 1,978 | 3,098
Business or Other Assets | PPP loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 0 | 1,365
Business or Other Assets | Income-producing - commercial real estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 2,645 | 3,193
Business or Other Assets | Owner-occupied - commercial real estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 0 | 0
Business or Other Assets | Real estate mortgage - residential |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 0 | 0
Business or Other Assets | Construction - commercial and residential |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 0 | 0
Business or Other Assets | Home equity |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 0 | 0
Real Estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 27,230 | 31,479
Real Estate | Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 2,008 | 6,821
Real Estate | PPP loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 0 | 0
Real Estate | Income-producing - commercial real estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 4,333 | 19,378
Real Estate | Owner-occupied - commercial real estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 19,191 | 42
Real Estate | Real estate mortgage - residential |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 1,698 | 1,779
Real Estate | Construction - commercial and residential |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | 0 | 3,093
Real Estate | Home equity |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
PPP loans, net | $ 0 | $ 366

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