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FAIR VALUE - Level 3 Fair Value Measurement Activity (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
investment
Dec. 31, 2021
USD ($)
investment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Number of investment transfers | investment 0 0
Level 3 | Investment securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year $ 23,147 $ 31,503
Unrealized (loss) gain included in OCI (1,859) 31
Purchases 21,237 0
Net discount accretion 56 0
Principal payments and other (10) (4,842)
Sales (3,053) (3,545)
Calls (12,154) 0
Balance, end of year 27,193 23,147
Level 3 | Investment securities | Collateralized Mortgage Obligations    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
OTTI (171) 0
Level 3 | Interest rate lock commitments with customers    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year 353 673
Total gains (losses) included in earnings (318) (320)
Balance, end of year $ 35 $ 353