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Loans Receivable and Allowance for Credit Losses (TDR Post-Modifications) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | $ 20,084 | $ 28,926 | $ 20,499 | $ 43,833 |
Commitment to lend | 10,200 |  | 10,200 |  | $ 3,000
Principal |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 3,373 | 11,766 | 3,788 | 15,898 |
Principal and Interest |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 10,775 |
Interest Deferments |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 17,160 | 0 | 17,160 |
Interest Rate Reduction |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 16,711 | 0 | 16,711 | 0 |
Commercial lending | Commercial and industrial (“C&I”) |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 20,084 | 28,926 | 20,499 | 43,833 |
Commercial lending | Commercial and industrial (“C&I”) | Principal |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 3,373 | 11,766 | 3,788 | 15,898 |
Commercial lending | Commercial and industrial (“C&I”) | Principal and Interest |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 10,775 |
Commercial lending | Commercial and industrial (“C&I”) | Interest Deferments |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | 0 | 17,160 | 0 | 17,160 |
Commercial lending | Commercial and industrial (“C&I”) | Interest Rate Reduction |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |
Post-Modification Outstanding Recorded Investment | $ 16,711 | $ 0 | $ 16,711 | $ 0 |

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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Definition Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554 + Details
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