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Fair Value Measurements - Recurring and Nonrecurring (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 $ 597,196 $ 648,825
US Treasury Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 8,954 8,707
U.S. Government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 95 98
Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 180,222 174,985
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 83,352 109,493
Private label residential mortgage and asset backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 324,573 355,542
Corporate Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022   0
Carrying Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable 1,276,144 1,245,456
Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable 1,213,098 1,113,849
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable 0 0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans receivable 1,213,098 1,113,849
Recurring | Corporate Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022   0
Recurring | Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 603,845 655,383
Recurring | Fair Value | US Treasury Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 8,954 8,707
Recurring | Fair Value | U.S. Government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 95 98
Recurring | Fair Value | Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 180,222 174,985
Recurring | Fair Value | U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 83,352 109,493
Recurring | Fair Value | Private label residential mortgage and asset backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 324,573 355,542
Recurring | Fair Value | Other equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI 6,649 6,558
Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 6,649 6,558
Recurring | Level 1 | US Treasury Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 1 | U.S. Government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 1 | Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 1 | U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 1 | Private label residential mortgage and asset backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 1 | Corporate Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022   0
Recurring | Level 1 | Other equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI 6,649 6,558
Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 597,196 648,825
Recurring | Level 2 | US Treasury Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 8,954 8,707
Recurring | Level 2 | U.S. Government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 95 98
Recurring | Level 2 | Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 180,222 174,985
Recurring | Level 2 | U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 83,352 109,493
Recurring | Level 2 | Private label residential mortgage and asset backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 324,573 355,542
Recurring | Level 2 | Corporate Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022   0
Recurring | Level 2 | Other equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI 0 0
Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 0 0
Recurring | Level 3 | US Treasury Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 3 | U.S. Government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 3 | Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 3 | U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 3 | Private label residential mortgage and asset backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022 0 0
Recurring | Level 3 | Corporate Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities, at fair value, net of allowance for credit losses of $0, with an amortized cost of $669,646 at December 31, 2023 and $740,468 at December 31, 2022   $ 0
Recurring | Level 3 | Other equity securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI $ 0