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Short-Term Borrowings (Short-Term Borrowings) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Short-term Debt [Line Items] |  |
Amount outstanding at period end | $ 1,871,271 | $ 1,665,061
Federal Funds Purchased [Member] |  |
Short-term Debt [Line Items] |  |
Amount outstanding at period end | 1,850 | 1,850
Average amount outstanding during period | 13,176 | 3,762
Maximum amount at any month end during period | $ 2,350 | $ 4,400
Weighted-average interest at period end | 3.90% | 0.15%
Weighted-average interest rate during period | 2.82% | 0.43%
Securities Sold Under Agreements to Repurchase [Member] |  |
Short-term Debt [Line Items] |  |
Amount outstanding at period end | $ 444,421 | $ 563,211
Average amount outstanding during period | 536,727 | 559,410
Maximum amount at any month end during period | $ 640,592 | $ 643,403
Weighted-average interest at period end | 0.53% | 0.05%
Weighted-average interest rate during period | 0.21% | 0.10%
FHLB Borrowings [Member] |  |
Short-term Debt [Line Items] |  |
Amount outstanding at period end | $ 1,425,000 | $ 1,100,000
Average amount outstanding during period | 808,784 | 1,100,000
Maximum amount at any month end during period | $ 1,425,000 | $ 1,100,000
Weighted-average interest at period end | 4.70% | 0.49%
Weighted-average interest rate during period | 1.82% | 0.49%

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