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Other Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Other Assets [Abstract] |  |
Derivative asset positions | $ 401,295 | $ 140,016
ROU assets | 380,380 | 374,716
Investments in low income housing, solar energy tax credits, and other CRA partnerships | 262,855 | 146,612
Accrued interest receivable | 177,865 | 127,641
Federal Reserve Bank and FHLB Stock | 157,520 | 286,447
Deferred tax asset, net | 130,848 | 65,102
Accounts receivable | 88,286 | 77,193
Prepaid expenses | 45,088 | 42,285
Mutual funds and mutual funds held in rabbi trusts | 37,650 | 32,348
MPS receivable(1) | 15,575 | 21,437
Trading account assets, at fair value | 10,880 | 7,212
Other real estate | 1,819 | 14,373
Private equity investments | 1,021 | 19,389
Taxes receivable | 0 | 8,648
Miscellaneous other assets | 49,517 | 55,511
Total other assets | $ 1,760,599 | $ 1,418,930

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