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Fair Value of Financial Instruments - Schedule of Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
ASSETS: |  |
Cash and cash equivalents | $ 180,796 | $ 190,826
Investment securities available-for-sale (at fair value) | 708,987 | 628,829
Investment securities held-to-maturity, fair value | 470,774 | 504,328
Held-to-maturity securities | 538,157 | 585,052
Loans receivable | 7,619,448 | 7,600,811
Loans held for sale | 16,765 | 18,854
LIABILITIES |  |
Time deposits | 1,052,449 | 981,970
Securities sold under agreements to repurchase | 19,517 | 19,627
Long-term debt | 54,433 | 54,200
Federal Home Loan bank advances |  | 340,000
Carrying amount | Level 1 |  |
ASSETS: |  |
Cash and cash equivalents | 180,796 | 190,826
Carrying amount | Level 2 |  |
ASSETS: |  |
FHLB and FRB stock | 24,629 | 40,890
Loans held for sale | 16,765 | 18,854
Accrued interest receivable | 49,025 | 44,944
LIABILITIES |  |
Deposit transaction accounts | 7,444,679 | 7,208,421
Time deposits | 1,052,449 | 981,970
Securities sold under agreements to repurchase | 19,517 | 19,627
Long-term debt | 55,000 | 55,000
Federal Home Loan bank advances |  | 340,000
Accrued interest payable | 18,044 | 12,239
Carrying amount | Level 3 |  |
ASSETS: |  |
Loans receivable | 7,714,495 | 7,698,758
Estimated fair value | Level 1 |  |
ASSETS: |  |
Cash and cash equivalents | 180,796 | 190,826
Estimated fair value | Level 2 |  |
ASSETS: |  |
FHLB and FRB stock | 24,629 | 40,890
Loans held for sale | 16,765 | 18,854
Accrued interest receivable | 49,025 | 44,944
LIABILITIES |  |
Deposit transaction accounts | 7,444,679 | 7,208,421
Time deposits | 1,048,454 | 972,793
Securities sold under agreements to repurchase | 19,517 | 19,627
Long-term debt | 52,592 | 43,760
Federal Home Loan bank advances |  | 340,000
Accrued interest payable | 18,044 | 12,239
Estimated fair value | Level 3 |  |
ASSETS: |  |
Loans receivable | 7,678,735 | 7,411,687
U.S. Treasury securities |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 49,190 | 73,044
Investment securities held-to-maturity, fair value | 49,157 | 48,334
Held-to-maturity securities | 49,563 | 49,338
U.S. Treasury securities | Carrying amount | Level 1 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 49,190 | 73,044
Investment securities held-to-maturity, fair value | 49,563 | 49,338
U.S. Treasury securities | Estimated fair value | Level 1 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 49,190 | 73,044
Investment securities held-to-maturity, fair value | 49,157 | 48,334
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 196,530 | 201,809
Investment securities held-to-maturity, fair value | 242,837 | 265,011
Held-to-maturity securities | 270,518 | 299,337
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises | Carrying amount | Level 2 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 196,530 | 201,809
Held-to-maturity securities | 270,518 | 299,337
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises | Estimated fair value | Level 2 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 196,530 | 201,809
Held-to-maturity securities | 242,837 | 265,011
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 460,496 | 351,242
Investment securities held-to-maturity, fair value | 178,780 | 190,983
Held-to-maturity securities | 218,076 | 236,377
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises | Carrying amount | Level 2 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 460,496 | 351,242
Held-to-maturity securities | 218,076 | 236,377
Other residential MBS issued or guaranteed by U.S. government agencies or sponsored enterprises | Estimated fair value | Level 2 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 460,496 | 351,242
Held-to-maturity securities | 178,780 | 190,983
Municipal securities |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 80 | 79
Municipal securities | Carrying amount | Level 2 |  |
ASSETS: |  |
Municipal obligations | 80 | 79
Municipal securities | Estimated fair value | Level 2 |  |
ASSETS: |  |
Municipal obligations | 80 | 79
Corporate debt |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 1,962 | 1,843
Corporate debt | Carrying amount | Level 2 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 1,962 | 1,843
Corporate debt | Estimated fair value | Level 2 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 1,962 | 1,843
Other securities |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 729 | 812
Other securities | Carrying amount | Level 3 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 729 | 812
Other securities | Estimated fair value | Level 3 |  |
ASSETS: |  |
Investment securities available-for-sale (at fair value) | 729 | 812
Interest rate swap | Carrying amount | Level 2 |  |
ASSETS: |  |
Derivative asset | $ 30,459 | $ 37,408
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other Assets | Other Assets
LIABILITIES |  |
Derivative liability | $ 13,377 | $ 15,284
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other Liabilities. | Other Liabilities.
Interest rate swap | Estimated fair value | Level 2 |  |
ASSETS: |  |
Derivative asset | $ 30,459 | $ 37,408
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other Assets | Other Assets
LIABILITIES |  |
Derivative liability | $ 13,377 | $ 15,284
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other Liabilities. | Other Liabilities.
Mortgage banking derivatives | Carrying amount | Level 3 |  |
ASSETS: |  |
Derivative asset | $ 640 | $ 287
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other Assets | Other Assets
LIABILITIES |  |
Derivative liability | $ 74 | $ 115
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other Liabilities. | Other Liabilities.
Mortgage banking derivatives | Estimated fair value | Level 3 |  |
ASSETS: |  |
Derivative asset | $ 640 | $ 287
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other Assets | Other Assets
LIABILITIES |  |
Derivative liability | $ 74 | $ 115
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other Liabilities. | Other Liabilities.

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