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FAIR VALUE OF ASSETS AND LIABILITIES (Level 3 Assets and Liabilities) (Details) - Mortgage revenue bonds - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis    
Aggregate fair value / Balance at the beginning of the period $ 7,268 $ 8,619
Principal payments received (62) (60)
Unrealized net gain included in other comprehensive income 99 (478)
Aggregate fair value / Balance at the end of the period 7,305 8,081
States and political subdivisions    
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis    
Aggregate fair value / Balance at the beginning of the period 6,584 7,681
Principal payments received (56) (55)
Unrealized net gain included in other comprehensive income 66 (397)
Aggregate fair value / Balance at the end of the period 6,594 7,229
Residential - Non-government agencies    
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis    
Aggregate fair value / Balance at the beginning of the period 684 938
Principal payments received (6) (5)
Unrealized net gain included in other comprehensive income 33 (81)
Aggregate fair value / Balance at the end of the period $ 711 $ 852