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Loans Receivable and Allowance for Credit Losses (Non-PCI TDR Modifications) (Details) - Non-PCI impaired loans - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | $ 92,649 | $ 12,081 | $ 43,651
Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 31,611 | 6,891 | 19,164
Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,495 | 0 | 8,003
Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 19,691 | 752 | 0
Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 39,852 | 4,438 | 16,484
Commercial Lending |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 91,023 | 10,272 | 43,496
Commercial Lending | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 31,611 | 5,472 | 19,164
Commercial Lending | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 7,848
Commercial Lending | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 19,691 | 752 | 0
Commercial Lending | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 39,721 | 4,048 | 16,484
Commercial Lending | C&I |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 71,332 | 9,520 | 37,900
Commercial Lending | C&I | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 31,611 | 5,472 | 13,568
Commercial Lending | C&I | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 7,848
Commercial Lending | C&I | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0
Commercial Lending | C&I | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 39,721 | 4,048 | 16,484
Commercial Lending | CRE |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  | 752 | 2,627
Commercial Lending | CRE | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  | 0 | 2,627
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 |  | 752 | 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 |  |  | 2,969
Commercial Lending | Residential loan | Multifamily | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 2,969
Commercial Lending | Residential loan | Multifamily | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Residential loan | Multifamily | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Residential loan | Multifamily | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment |  |  | 0
Commercial Lending | Construction and land |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 19,691 |  |
Commercial Lending | Construction and land | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 |  |
Commercial Lending | Construction and land | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 |  |
Commercial Lending | Construction and land | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 19,691 |  |
Commercial Lending | Construction and land | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 |  |
Commercial Lending | Total CRE |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 19,691 | 752 | 5,596
Commercial Lending | Total CRE | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 5,596
Commercial Lending | Total CRE | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0
Commercial Lending | Total CRE | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 19,691 | 752 | 0
Commercial Lending | Total CRE | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0
Consumer Lending |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,626 | 1,809 | 155
Consumer Lending | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 1,419 | 0
Consumer Lending | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,495 | 0 | 155
Consumer Lending | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0
Consumer Lending | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 131 | 390 | 0
Consumer Lending | Residential loan | Single-family |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,098 | 391 |
Consumer Lending | Residential loan | Single-family | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 66 |
Consumer Lending | Residential loan | Single-family | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,098 | 0 |
Consumer Lending | Residential loan | Single-family | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 |
Consumer Lending | Residential loan | Single-family | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 325 |
Consumer Lending | HELOCs |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 528 | 1,418 | 155
Consumer Lending | HELOCs | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 1,353 | 0
Consumer Lending | HELOCs | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 397 | 0 | 155
Consumer Lending | HELOCs | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0
Consumer Lending | HELOCs | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 131 | 65 | 0
Consumer Lending | Total residential mortgage |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,626 | 1,809 | 155
Consumer Lending | Total residential mortgage | Principal |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 1,419 | 0
Consumer Lending | Total residential mortgage | Principal and Interest |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 1,495 | 0 | 155
Consumer Lending | Total residential mortgage | Interest Rate Reduction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0
Consumer Lending | Total residential mortgage | Other |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | $ 131 | $ 390 | $ 0

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