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Loans Receivable and Allowance for Credit Losses - Amortized Cost of Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | $ 59,876 | $ 44,585
Commercial lending |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 44,712 | 34,342
Commercial lending | Commercial and industrial (“C&I”) |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 29,336 | 11,398
Commercial lending | CRE |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 0 | 22,944
Commercial lending | Real estate loan | Multifamily residential |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 4,235 | 0
Commercial lending | Construction and land |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 11,141 | 0
Consumer lending |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 15,164 | 10,243
Consumer lending | Real estate loan | Single-family residential |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 6,681 | 2,998
Consumer lending | HELOCs |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | $ 8,483 | $ 7,245

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