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FAIR VALUE MEASUREMENT - Schedule of Fair Value Hierarchy Measurement (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets:
Investment securities AFS	$ 1,132,157	$ 1,251,199
Derivatives	907	1,064
Liabilities:
Derivative liabilities	11,823	10,588
Residential mortgage-backed securities
Assets:
Investment securities AFS	173,753	183,798
Commercial mortgage-backed securities
Assets:
Investment securities AFS	47,421	47,756
Municipal bonds
Assets:
Investment securities AFS	391,787	404,874
Corporate debt securities
Assets:
Investment securities AFS	34,776	38,547
U.S. Treasury securities
Assets:
Investment securities AFS	19,838	20,184
Agency debentures
Assets:
Investment securities AFS	53,133	58,905
Recurring
Assets:
Single family LHFS	22,147	12,849
Single family LHFI	1,286	1,280
Single family mortgage servicing rights	73,725	74,249
Total assets	1,267,775	1,375,458
Liabilities:
Total liabilities	11,836	10,783
Recurring | Residential mortgage-backed securities
Assets:
Investment securities AFS	173,753	183,798
Recurring | Commercial mortgage-backed securities
Assets:
Investment securities AFS	47,421	47,756
Recurring | Collateralized mortgage obligations residential
Assets:
Investment securities AFS	354,961	439,738
Recurring | Collateralized mortgage obligations commercial
Assets:
Investment securities AFS	56,488	57,397
Recurring | Municipal bonds
Assets:
Investment securities AFS	391,787	404,874
Recurring | Corporate debt securities
Assets:
Investment securities AFS	34,776	38,547
Recurring | U.S. Treasury securities
Assets:
Trading securities - U.S. Treasury securities	26,102	24,698
Investment securities AFS	19,838	20,184
Recurring | Agency debentures
Assets:
Investment securities AFS	53,133	58,905
Recurring | Futures
Liabilities:
Derivative liabilities	10	3
Recurring | Forward sale commitments
Assets:
Derivatives	171	151
Liabilities:
Derivative liabilities	146	288
Recurring | Options
Assets:
Derivatives	24	132
Recurring | Interest rate lock commitments
Assets:
Derivatives	525	411
Liabilities:
Derivative liabilities	42
Recurring | Interest rate swaps
Assets:
Derivatives	11,638	10,489
Liabilities:
Derivative liabilities	11,638	10,492
Level 1 | Recurring
Assets:
Single family LHFS	0	0
Single family LHFI	0	0
Single family mortgage servicing rights	0	0
Total assets	26,126	24,830
Liabilities:
Total liabilities	10	3
Level 1 | Recurring | Residential mortgage-backed securities
Assets:
Investment securities AFS	0	0
Level 1 | Recurring | Commercial mortgage-backed securities
Assets:
Investment securities AFS	0	0
Level 1 | Recurring | Collateralized mortgage obligations residential
Assets:
Investment securities AFS	0	0
Level 1 | Recurring | Collateralized mortgage obligations commercial
Assets:
Investment securities AFS	0	0
Level 1 | Recurring | Municipal bonds
Assets:
Investment securities AFS	0	0
Level 1 | Recurring | Corporate debt securities
Assets:
Investment securities AFS	0	0
Level 1 | Recurring | U.S. Treasury securities
Assets:
Trading securities - U.S. Treasury securities	26,102	24,698
Investment securities AFS	0	0
Level 1 | Recurring | Agency debentures
Assets:
Investment securities AFS	0	0
Level 1 | Recurring | Futures
Liabilities:
Derivative liabilities	10	3
Level 1 | Recurring | Forward sale commitments
Assets:
Derivatives	0	0
Liabilities:
Derivative liabilities	0	0
Level 1 | Recurring | Options
Assets:
Derivatives	24	132
Level 1 | Recurring | Interest rate lock commitments
Assets:
Derivatives	0	0
Liabilities:
Derivative liabilities	0
Level 1 | Recurring | Interest rate swaps
Assets:
Derivatives	0	0
Liabilities:
Derivative liabilities	0	0
Level 2 | Recurring
Assets:
Single family LHFS	22,147	12,849
Single family LHFI	0	0
Single family mortgage servicing rights	0	0
Total assets	1,164,344	1,272,828
Liabilities:
Total liabilities	11,784	10,780
Level 2 | Recurring | Residential mortgage-backed securities
Assets:
Investment securities AFS	171,984	181,938
Level 2 | Recurring | Commercial mortgage-backed securities
Assets:
Investment securities AFS	47,421	47,756
Level 2 | Recurring | Collateralized mortgage obligations residential
Assets:
Investment securities AFS	354,961	439,738
Level 2 | Recurring | Collateralized mortgage obligations commercial
Assets:
Investment securities AFS	56,488	57,397
Level 2 | Recurring | Municipal bonds
Assets:
Investment securities AFS	391,787	404,874
Level 2 | Recurring | Corporate debt securities
Assets:
Investment securities AFS	34,776	38,547
Level 2 | Recurring | U.S. Treasury securities
Assets:
Trading securities - U.S. Treasury securities	0	0
Investment securities AFS	19,838	20,184
Level 2 | Recurring | Agency debentures
Assets:
Investment securities AFS	53,133	58,905
Level 2 | Recurring | Futures
Liabilities:
Derivative liabilities	0	0
Level 2 | Recurring | Forward sale commitments
Assets:
Derivatives	171	151
Liabilities:
Derivative liabilities	146	288
Level 2 | Recurring | Options
Assets:
Derivatives	0	0
Level 2 | Recurring | Interest rate lock commitments
Assets:
Derivatives	0	0
Liabilities:
Derivative liabilities	0
Level 2 | Recurring | Interest rate swaps
Assets:
Derivatives	11,638	10,489
Liabilities:
Derivative liabilities	11,638	10,492
Level 3 | Recurring
Assets:
Single family LHFS	0	0
Single family LHFI	1,286	1,280
Single family mortgage servicing rights	73,725	74,249
Total assets	77,305	77,800
Liabilities:
Total liabilities	42	0
Level 3 | Recurring | Residential mortgage-backed securities
Assets:
Investment securities AFS	1,769	1,860
Level 3 | Recurring | Commercial mortgage-backed securities
Assets:
Investment securities AFS	0	0
Level 3 | Recurring | Collateralized mortgage obligations residential
Assets:
Investment securities AFS	0	0
Level 3 | Recurring | Collateralized mortgage obligations commercial
Assets:
Investment securities AFS	0	0
Level 3 | Recurring | Municipal bonds
Assets:
Investment securities AFS	0	0
Level 3 | Recurring | Corporate debt securities
Assets:
Investment securities AFS	0	0
Level 3 | Recurring | U.S. Treasury securities
Assets:
Trading securities - U.S. Treasury securities	0	0
Investment securities AFS	0	0
Level 3 | Recurring | Agency debentures
Assets:
Investment securities AFS	0	0
Level 3 | Recurring | Futures
Liabilities:
Derivative liabilities	0	0
Level 3 | Recurring | Forward sale commitments
Assets:
Derivatives	0	0
Liabilities:
Derivative liabilities	0	0
Level 3 | Recurring | Options
Assets:
Derivatives	0
Level 3 | Recurring | Interest rate lock commitments
Assets:
Derivatives	525	411
Liabilities:
Derivative liabilities	42
Level 3 | Recurring | Interest rate swaps
Assets:
Derivatives	0	0
Liabilities:
Derivative liabilities	$ 0	$ 0

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