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Derivatives - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
contract
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
contract
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Derivative [Line Items]          
Loss recognized in OCI   $ 100,000   $ 300,000  
Reclassification from AOCI into income $ 200,000 $ 100,000 $ 500,000 $ 300,000  
Reclassification of fair value hedge from AOCI into income 700,000   7,000,000    
Amount of fair value hedge expected to be reclassified from accumulated other comprehensive income into interest income (5,400)   100,000    
Back-to-Back Swap          
Derivative [Line Items]          
Notional amount 505,742,000   $ 505,742,000   $ 312,808,000
Weighted average maturity (in years)     6 years   6 years 8 months 12 days
Back-to-Back Swap | Fair Value Hedging          
Derivative [Line Items]          
Notional amount $ 400,000,000   $ 400,000,000    
Number of derivative contracts | contract 2   2    
Back-to-Back Swap | Other Assets and Other Liabilities          
Derivative [Line Items]          
Fair value of derivative assets and liabilities $ 37,362,000   $ 37,362,000   $ 23,140,000
Back-to-Back Swap | Other Assets | Fair Value Hedging          
Derivative [Line Items]          
Fair value of derivative assets and liabilities 6,914,000   6,914,000    
Interest Rate Floor          
Derivative [Line Items]          
Notional amount $ 300,000,000   $ 300,000,000   300,000,000
Number of derivative contracts | contract 2   2    
Amount expected to be reclassified from accumulated other comprehensive income into interest income     $ 100,000    
Interest Rate Floor | Other Assets          
Derivative [Line Items]          
Fair value of derivative assets and liabilities $ 0   0   $ 2,000
Interest Rate Floor, October 2023 Maturity          
Derivative [Line Items]          
Notional amount 150,000,000   150,000,000    
Interest Rate Floor, November 2023 Maturity          
Derivative [Line Items]          
Notional amount 150,000,000   150,000,000    
Interest Rate Swap 1, April 2025 Maturity | Fair Value Hedging          
Derivative [Line Items]          
Notional amount 200,000,000   200,000,000    
Interest Rate Swap 2, April 2025 Maturity | Fair Value Hedging          
Derivative [Line Items]          
Notional amount $ 200,000,000   $ 200,000,000