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v3.23.1

Short-Term Borrowings (Narrative) (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 04, 2023 USD ($) | Mar. 31, 2022 USD ($) Item | Dec. 31, 2022 USD ($) Item | Mar. 31, 2023 USD ($)
Short-Term Debt [Line Items] |  |  |  |
Short-term borrowings |  |  | $ 1,871,271 | $ 3,519,497
FHLB Borrowings [Member] |  |  |  |
Short-Term Debt [Line Items] |  |  |  |
Short-term borrowings |  | $ 3,100,000 | $ 1,425,000 | $ 3,100,000
FHLB Borrowings [Member] | FHLB Borrowings, Redemption Period One [Member] | Fixed-rate Whole Loan Advances and Term Notes [Member] |  |  |  |
Short-Term Debt [Line Items] |  |  |  |
Number of fixed rate short-term borrowings | Item |  | 5 | 1 |
Short-term maturity year |  | 2023 | 2023 |
Subsequent Event [Member] | FHLB Borrowings [Member] |  |  |  |
Short-Term Debt [Line Items] |  |  |  |
Repayment of short-term borrowings | $ 1,450,000 |  |  |

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