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Loans Receivable and Allowance for Credit Losses (Non-PCI TDR Modifications) (Details) - Non-PCI Loans - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | $ 7,029 | $ 8,006 | $ 82,283 | $ 10,666
Principal |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 6,000 | 8,006 | 44,271 | 9,470
Interest Rate Reduction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 798
Interest Deferments |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 893 | 0 | 1,109 | 0
Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 136 | 0 | 36,903 | 398
Commercial lending |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 6,000 | 8,006 | 81,038 | 8,804
Commercial lending | Principal |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 6,000 | 8,006 | 44,271 | 8,006
Commercial lending | Interest Rate Reduction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 798
Commercial lending | Interest Deferments |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Commercial lending | Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 36,767 | 0
Commercial lending | Commercial and industrial (“C&I”) |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 6,000 | 8,006 | 81,038 | 8,006
Commercial lending | Commercial and industrial (“C&I”) | Principal |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 6,000 | 8,006 | 44,271 | 8,006
Commercial lending | Commercial and industrial (“C&I”) | Interest Rate Reduction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Commercial lending | Commercial and industrial (“C&I”) | Interest Deferments |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Commercial lending | Commercial and industrial (“C&I”) | Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 36,767 | 0
Commercial lending | Commercial real estate (“CRE”) |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 798
Commercial lending | Commercial real estate (“CRE”) | Principal |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment |  |  | 0 | 0
Commercial lending | Commercial real estate (“CRE”) | Interest Rate Reduction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment |  |  | 0 | 798
Commercial lending | Commercial real estate (“CRE”) | Interest Deferments |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment |  |  | 0 | 0
Commercial lending | Commercial real estate (“CRE”) | Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment |  |  | 0 | 0
Consumer lending |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 1,029 | 0 | 1,245 | 1,862
Consumer lending | Principal |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 1,464
Consumer lending | Interest Rate Reduction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Consumer lending | Interest Deferments |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 893 | 0 | 1,109 | 0
Consumer lending | Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 136 | 0 | 136 | 398
Consumer lending | Real estate loan | Single-family residential |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 893 | 0 | 1,109 | 395
Consumer lending | Real estate loan | Single-family residential | Principal |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 64
Consumer lending | Real estate loan | Single-family residential | Interest Rate Reduction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Consumer lending | Real estate loan | Single-family residential | Interest Deferments |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 893 | 0 | 1,109 | 0
Consumer lending | Real estate loan | Single-family residential | Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 331
Consumer lending | HELOCs |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 136 | 0 | 136 | 1,467
Consumer lending | HELOCs | Principal |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 1,400
Consumer lending | HELOCs | Interest Rate Reduction |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Consumer lending | HELOCs | Interest Deferments |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Consumer lending | HELOCs | Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Post- Modification Outstanding Recorded Investment | $ 136 | $ 0 | $ 136 | $ 67

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