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Fair Value Measurements - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Equity Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Balance $ 2,542 $ 1,768
Total realized and unrealized gains included in income 25 (1)
Net purchases, sales, calls, and maturities 70 0
Net transfers into Level 3 0 0
Balance 2,637 1,767
Amount of total losses for the period included in earning attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at September 30, 25 (1)
Net transfers into Level 3 0 0
Available-for-Sale Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Balance 0 21,050
Net purchases, sales, calls, and maturities 0 0
Net transfers into Level 3 0 0
Balance 0 0
Amount of total losses for the period included in earning attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at September 30, 0 0
Total unrealized gains included in other comprehensive income 0 0
Net transfers into Level 3 0 0
Transfer to held to maturity $ 0 $ (21,050)