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Derivatives (Tables)
9 Months Ended
Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Carrying Value and Fair Value Hedging Adjustment of Portfolio Layer Method Hedged Asset
The following table represents the carrying value of the portfolio layer method hedged assets and the cumulative fair value hedging adjustments included in the carrying value of the hedged assets as of September 30, 2024 and December 31, 2023:

September 30, 2024December 31, 2023
(Dollars in thousands)Balance Sheet LocationAmortized Cost BasisHedged AssetBasis AdjustmentAmortized Cost BasisHedged AssetBasis Adjustment
Fixed rate mortgagesLoans receivable$469,103 $379,315 $4,422 $491,018 $390,297 $4,055 
Fixed rate bondsInvestment securities available-for-sale$59,436 $50,000 $1,736 $59,270 $50,000 $1,570 
Total hedged assets$528,539 $429,315 $6,158 $550,288 $440,297 $5,625 
Schedule of Outstanding Financial Derivative Instruments
The following tables summarize outstanding financial derivative instruments as of September 30, 2024 and December 31, 2023:
September 30, 2024
(Dollars in thousands)Balance Sheet LocationNotional AmountFair Value of Asset (Liability)Gain (Loss)
Fair value hedge of interest rate risk:
Pay fixed rate swaps with counterpartyAccrued interest receivable and other assets$429,315 $(6,617)$(506)
Not designated hedges of interest rate risk:
Matched interest rate swaps with borrowersAccrued interest receivable and other assets138,442 3,891 3,891 
Matched interest rate swaps with counterpartyAccrued interest payable and other liabilities138,442 (3,891)(3,891)
Total derivatives$706,199 $(6,617)$(506)

December 31, 2023
(Dollars in thousands)Balance Sheet LocationNotional AmountFair Value of Asset (Liability)Gain (Loss)
Fair value hedge of interest rate risk:
Pay fixed rate swaps with counterpartyAccrued interest receivable and other assets$440,297 $(6,111)$(6,111)
Not designated hedges of interest rate risk:
Matched interest rate swaps with borrowersAccrued interest receivable and other assets126,494 6,249 6,249 
Matched interest rate swaps with counterpartyAccrued interest payable and other liabilities126,494 (6,249)(6,249)
Total derivatives$693,285 $(6,111)$(6,111)