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Fair Values of Financial Instruments (Other Investments Not Measured at Fair Value on a Recurring Basis) (Details) - Fair Value, Nonrecurring - Fair Value Inputs, Level 2 - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
FHLB common stock (1) $ 10,000 $ 22,000
Short-term loans (2) 0 316,417
Collateral loans (3) 64,594 64,594
Company owned life insurance ("COLI") (4) $ 404,598 $ 397,683