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Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Estimated Unfunded Commitments) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Investments in Tax Credit and Other Investments, Net [Line Items] |  |
Unrealized gain (loss) recognized on marketable equity securities held | $ 789 | $ (547)
Unfunded commitments related to investments in qualified affordable housing partnerships, tax credit and other investments |  |
2020 | 121,875 |
2021 | 32,039 |
2022 | 13,459 |
2023 | 15,753 |
2024 | 8,145 |
Thereafter | 2,538 |
Total | 193,809 |
Investments in tax credit and other investments, net |  |
Investments in Tax Credit and Other Investments, Net [Line Items] |  |
Marketable equity securities | $ 31,700 | $ 31,200

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