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Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Investments in Tax Credit and Other Investments, Net) (Details) | 3 Months Ended |
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Mar. 31, 2021 USD ($) credit | Mar. 31, 2020 USD ($) credit | Dec. 31, 2020 USD ($)
Investments in Tax Credit and Other Investments, Net, And Related Unfunded Commitments [Abstract] |  |  |
Investments in tax credit and other investments, net | $ 361,438,000 |  | $ 266,525,000
Accrued expenses and other liabilities — Unfunded commitments | 192,644,000 |  | 105,282,000
Amortization expense of tax credit and other investments | 25,358,000 | $ 18,782,000 |
Unrealized gains (losses) recognized on equity securities with readily determinable fair values | (497,000) | 38,000 |
Adjustments to equity securities without readily determinable fair values | $ 0 | $ 0 |
Number of recovered historic tax credit investments | credit | 1 | 1 |
Investment in tax credit and other investments |  |  |
Investments in Tax Credit and Other Investments, Net, And Related Unfunded Commitments [Abstract] |  |  |
OTTI charges | $ 0 | $ 0 |
Pre-tax recoveries | 374,000 | $ 150,000 |
Tax credit investments |  |  |
Investments in Tax Credit and Other Investments, Net, And Related Unfunded Commitments [Abstract] |  |  |
Equity securities with readily determinable fair values | 26,700,000 |  | 31,300,000
Investments in Tax Credit and Other Investments and Other Assets |  |  |
Investments in Tax Credit and Other Investments, Net, And Related Unfunded Commitments [Abstract] |  |  |
Equity securities without readily determinable fair values | $ 27,200,000 |  | $ 23,700,000

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- Definition Represents the net amount of investments in the projects, excluding affordable housing projects, that qualify for Community Reinvestment Act (CRA) credits or other types of tax credits. + References No definition available. + Details
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- Definition Amortization of investments in projects that qualify for Community Reinvestment Act ("CRA") and other tax credits, included as a component of noninterest expense. + References No definition available. + Details
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- Definition Number of Impaired or Recovered Tax Credit Investments + References No definition available. + Details
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- Definition Amount of commitment or contingent commitments to investments in certain limited partnerships that qualify for Community Reinvestment Act (CRA) credits or other types of tax credits. + References No definition available. + Details
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- Definition Tax Credit Investments, Pre-tax Recoveries + References No definition available. + Details
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740 + Details
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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117539-209714 + Details
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