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Loans Receivable and Allowance for Credit Losses (TDR Post-Modifications) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | $ 21,329 | $ 156,914 |
Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | $ 92,649
Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 5,745 | 81,581 |
Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 31,611
Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 10,863 |
Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 1,495
Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 15,584 | 31,913 |
Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 19,691
Interest Deferments |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 32,557 |
Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 39,852
Commercial Lending |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 21,329 | 156,914 |
Commercial Lending | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 91,023
Commercial Lending | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 5,745 | 81,581 |
Commercial Lending | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 31,611
Commercial Lending | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 10,863 |
Commercial Lending | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 15,584 | 31,913 |
Commercial Lending | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 19,691
Commercial Lending | Interest Deferments |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 32,557 |
Commercial Lending | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 39,721
Commercial Lending | C&I |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 20,263 | 134,467 |
Commercial Lending | C&I | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 71,332
Commercial Lending | C&I | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 4,679 | 59,134 |
Commercial Lending | C&I | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 31,611
Commercial Lending | C&I | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 10,863 |
Commercial Lending | C&I | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | C&I | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 15,584 | 31,913 |
Commercial Lending | C&I | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | C&I | Interest Deferments |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 32,557 |
Commercial Lending | C&I | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | C&I | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | C&I | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 39,721
Commercial Lending | CRE |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 21,221 |
Commercial Lending | CRE | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 21,221 |
Commercial Lending | CRE | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | CRE | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | CRE | Interest Deferments |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | CRE | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Residential loan | Multifamily |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,066 | 1,226 |
Commercial Lending | Residential loan | Multifamily | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,066 | 1,226 |
Commercial Lending | Residential loan | Multifamily | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Residential loan | Multifamily | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Residential loan | Multifamily | Interest Deferments |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Residential loan | Multifamily | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Residential loan | Construction and land | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 19,691
Commercial Lending | Residential loan | Construction and land | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Residential loan | Construction and land | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Residential loan | Construction and land | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 19,691
Commercial Lending | Residential loan | Construction and land | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Residential loan | Construction and land | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Construction and land | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 19,691
Commercial Lending | Total CRE |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,066 | 22,447 |
Commercial Lending | Total CRE | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 19,691
Commercial Lending | Total CRE | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,066 | 22,447 |
Commercial Lending | Total CRE | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Total CRE | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Total CRE | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Total CRE | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Total CRE | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 19,691
Commercial Lending | Total CRE | Interest Deferments |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Commercial Lending | Total CRE | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Total CRE | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | $ 0 | $ 0 |
Commercial Lending | Total CRE | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 1,626
Consumer Lending | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 1,495
Consumer Lending | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 131
Consumer Lending | Residential loan | Single-family | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 1,098
Consumer Lending | Residential loan | Single-family | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Residential loan | Single-family | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 1,098
Consumer Lending | Residential loan | Single-family | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Residential loan | Single-family | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Residential loan | Single-family | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | HELOCs | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 528
Consumer Lending | HELOCs | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | HELOCs | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 397
Consumer Lending | HELOCs | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | HELOCs | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | HELOCs | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 131
Consumer Lending | Total residential mortgage | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 1,626
Consumer Lending | Total residential mortgage | Principal | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Total residential mortgage | Principal and Interest | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 1,495
Consumer Lending | Total residential mortgage | Interest Rate Reduction | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Total residential mortgage | Interest Deferments | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Consumer Lending | Total residential mortgage | Other | Non-PCI impaired loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | $ 131

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