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Loans and Allowance for Credit Losses - Classes of loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	$ 4,761,848	$ 4,661,348
Allowance for credit losses	(64,760)	(64,670)	$ (63,480)	$ (60,754)
Deferred loan fees and gains, net	(6,695)	(7,058)
Loans receivable, net	$ 4,690,393	$ 4,589,620
Weighted average interest rate	6.08%	6.25%
One- to four-family residential construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	$ 30,533	$ 29,628
Subdivision construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	19,861	23,359
Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	42,504	48,015
Commercial construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	352,793	703,407
Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	710,446	769,260
Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	122,901	121,275
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	1,543,742	1,521,032
Other residential (multi-family)
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	1,549,249	942,071
Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	208,947	318,050
Industrial revenue bonds
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	11,344	12,047
Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	25,787	28,343
Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	27,905	28,978
Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	$ 115,836	$ 115,883

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