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Loans Receivable and Allowance for Credit Losses (Amortized Cost of Loans on Nonaccrual Status) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | $ 42,887 | $ 126,676
Commercial Lending |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 32,069 | 110,096
Commercial Lending | C&I |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 22,967 | 62,040
Commercial Lending | CRE |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 9,102 | 45,537
Commercial Lending | Total CRE |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 9,102 | 48,056
Commercial Lending | Real estate loan | Multifamily |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 0 | 2,519
Consumer Lending |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 10,818 | 16,580
Consumer Lending | Real estate loan | Single-family |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 5,785 | 6,013
Consumer Lending | HELOCs |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 5,033 | 8,076
Consumer Lending | Total residential mortgage |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | 10,818 | 14,089
Consumer Lending | Other consumer |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Total nonaccrual loans with no related allowance for loan losses | $ 0 | $ 2,491

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