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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Change in Level 3 Assets and Liabilities) (Details 3) - Mortgage revenue bonds
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
security
Mar. 31, 2021
USD ($)
Dec. 31, 2021
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 $ 8,619 $ 12,326  
Principal payments received (60) (1,978)  
Unrealized net loss included in other comprehensive income (478) (752)  
Aggregate fair value / Balance at the end of the period 8,081 9,596  
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 7,681 11,337  
Principal payments received (55) (1,973)  
Unrealized net loss included in other comprehensive income (397) (673)  
Aggregate fair value / Balance at the end of the period $ 7,229 8,691  
Additional disclosures      
Number of investment securities held | security 2    
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 $ 938 989  
Principal payments received (5) (5)  
Unrealized net loss included in other comprehensive income (81) (79)  
Aggregate fair value / Balance at the end of the period $ 852 $ 905  
Additional disclosures      
Number of investment securities held | security 2    
Measurement Input, Discount Rate | Weighted average      
Additional disclosures      
Weighted average prepayment speed assumption 0.0463   0.0346