LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Nonperforming Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 6,434,020	$ 6,493,740
1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	1,242	18,062
2025/2024	15,837	20,514
2024/2023	12,678	3,043
2023/2022	3,322	0
2022/2021	0	0
Prior	38	40
Revolving Loans Amortized Cost Basis	14	0
Revolving Loans Converted to Term	0	0
Total	33,131	41,659
2026/2025	0	0
2025/2024	0	0
2024/2023	0	0
2023/2022	0	0
2022/2021	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	13,746	73,131
2025/2024	74,912	48,440
2024/2023	46,028	27,065
2023/2022	25,312	31,431
2022/2021	29,345	10,894
Prior	49,540	41,226
Revolving Loans Amortized Cost Basis	9,060	10,387
Revolving Loans Converted to Term	9,908	8,249
Total	257,851	250,823
2026/2025	0	0
2025/2024	0	0
2024/2023	0	0
2023/2022	0	0
2022/2021	0	0
Prior	0	70
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	70
Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	29,445	175,773
2025/2024	181,011	183,951
2024/2023	182,131	196,021
2023/2022	193,687	353,226
2022/2021	346,400	279,135
Prior	811,651	572,549
Revolving Loans Amortized Cost Basis	2,552	2,416
Revolving Loans Converted to Term	0	0
Total	1,746,877	1,763,071
2026/2025	0	0
2025/2024	0	0
2024/2023	0	0
2023/2022	0	300
2022/2021	72	32
Prior	1	20
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	73	352
Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	5,511	28,235
2025/2024	27,774	31,884
2024/2023	22,745	25,271
2023/2022	24,184	27,018
2022/2021	25,557	11,700
Prior	25,015	15,462
Revolving Loans Amortized Cost Basis	1,807	1,220
Revolving Loans Converted to Term	0	0
Total	132,593	140,790
2026/2025	0	260
2025/2024	0	0
2024/2023	0	0
2023/2022	0	0
2022/2021	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	260
Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	2,408	9,962
2025/2024	8,575	4,758
2024/2023	6,401	4,196
2023/2022	5,231	6,646
2022/2021	6,527	2,741
Prior	22,387	20,496
Revolving Loans Amortized Cost Basis	0	154
Revolving Loans Converted to Term	0	0
Total	51,529	48,953
2026/2025	0	0
2025/2024	0	38
2024/2023	0	4
2023/2022	0	3
2022/2021	4	7
Prior	22	106
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	26	158
Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	1,790	5,071
2025/2024	4,541	3,999
2024/2023	3,618	4,791
2023/2022	4,154	2,045
2022/2021	1,704	342
Prior	977	789
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	16,784	17,037
2026/2025	0	18
2025/2024	3	11
2024/2023	0	23
2023/2022	0	0
2022/2021	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	3	52
Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	3,956	21,397
2025/2024	18,906	15,455
2024/2023	13,324	7,035
2023/2022	6,007	2,677
2022/2021	2,261	1,217
Prior	4,638	3,693
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	49,092	51,474
2026/2025	0	141
2025/2024	136	1,068
2024/2023	201	715
2023/2022	113	188
2022/2021	27	72
Prior	12	15
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	489	2,199
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,270,995	2,296,914
Performing | 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	1,242	18,062
2025/2024	15,837	20,514
2024/2023	12,678	3,043
2023/2022	3,322	0
2022/2021	0	0
Prior	38	40
Revolving Loans Amortized Cost Basis	14	0
Revolving Loans Converted to Term	0	0
Total	33,131	41,659
Performing | Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	13,746	73,131
2025/2024	74,912	48,440
2024/2023	46,028	27,018
2023/2022	25,312	31,431
2022/2021	29,345	10,894
Prior	49,508	41,169
Revolving Loans Amortized Cost Basis	9,025	10,387
Revolving Loans Converted to Term	7,957	6,349
Total	255,833	248,819
Performing | Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	29,445	175,742
2025/2024	180,985	183,335
2024/2023	181,552	192,874
2023/2022	190,491	350,908
2022/2021	344,037	277,658
Prior	804,775	567,167
Revolving Loans Amortized Cost Basis	2,552	2,416
Revolving Loans Converted to Term	0	0
Total	1,733,837	1,750,100
Performing | Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	5,511	27,734
2025/2024	27,382	31,840
2024/2023	22,701	25,138
2023/2022	24,004	26,987
2022/2021	25,512	11,589
Prior	24,710	15,252
Revolving Loans Amortized Cost Basis	1,749	1,162
Revolving Loans Converted to Term	0	0
Total	131,569	139,702
Performing | Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	2,408	9,962
2025/2024	8,575	4,754
2024/2023	6,397	4,194
2023/2022	5,229	6,642
2022/2021	6,521	2,736
Prior	22,347	20,470
Revolving Loans Amortized Cost Basis	0	154
Revolving Loans Converted to Term	0	0
Total	51,477	48,912
Performing | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	1,790	5,071
2025/2024	4,541	3,973
2024/2023	3,595	4,780
2023/2022	4,143	2,028
2022/2021	1,651	342
Prior	976	788
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	16,696	16,982
Performing | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	3,956	21,250
2025/2024	18,765	15,173
2024/2023	13,071	6,872
2023/2022	5,906	2,617
2022/2021	2,188	1,166
Prior	4,566	3,662
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	48,452	50,740
Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Total	16,862	16,893
Nonperforming | 1-4 Family Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	0	0
2025/2024	0	0
2024/2023	0	0
2023/2022	0	0
2022/2021	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Nonperforming | Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	0	0
2025/2024	0	0
2024/2023	0	47
2023/2022	0	0
2022/2021	0	0
Prior	32	57
Revolving Loans Amortized Cost Basis	35	0
Revolving Loans Converted to Term	1,951	1,900
Total	2,018	2,004
Nonperforming | Residential Mortgages secured by first liens
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	0	31
2025/2024	26	616
2024/2023	579	3,147
2023/2022	3,196	2,318
2022/2021	2,363	1,477
Prior	6,876	5,382
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	13,040	12,971
Nonperforming | Residential Mortgages secured by junior liens
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	0	501
2025/2024	392	44
2024/2023	44	133
2023/2022	180	31
2022/2021	45	111
Prior	305	210
Revolving Loans Amortized Cost Basis	58	58
Revolving Loans Converted to Term	0	0
Total	1,024	1,088
Nonperforming | Other revolving credit plans
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	0	0
2025/2024	0	4
2024/2023	4	2
2023/2022	2	4
2022/2021	6	5
Prior	40	26
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	52	41
Nonperforming | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	0	0
2025/2024	0	26
2024/2023	23	11
2023/2022	11	17
2022/2021	53	0
Prior	1	1
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	88	55
Nonperforming | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2026/2025	0	147
2025/2024	141	282
2024/2023	253	163
2023/2022	101	60
2022/2021	73	51
Prior	72	31
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	$ 640	$ 734