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Other Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Income taxes receivable | $ 798,640 | $ 66,465
Pension assets | 289,030 | 157,902
Investment in low-income housing tax credits | 156,588 | 163,866
Cash surrender value of life insurance | 113,391 | 111,671
Right of use assets for operating leases, net of accumulated amortization | 63,207 | 68,048
Prepaid expenses | 37,660 | 40,489
Federal Home Loan Bank stock | 40,450 | 45,392
Other | 158,390 | 130,119
Total other assets | $ 1,657,356 | $ 783,953

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