PORTFOLIO LOANS - Schedule of Risk Grades of Portfolio Loans, Further Sorted by Origination (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	$ 672,037	$ 1,137,553
2025 / 2024, charge-off	0	9
2024 / 2023	1,897,540	1,129,573
2024 /2023, charge-off	147	15,011
2023 / 2022	1,721,734	1,485,489
2023 / 2022, charge-off	2,326	254
2022 / 2021	2,360,670	1,250,313
2022 / 2021, charge-off	149	3,099
2021 / 2020	1,704,314	619,027
2021 / 2020, charge-off	13,844	4
Prior	1,758,030	774,903
Prior, charge-off	11,248	1,189
Revolving Loans	3,754,032	1,300,229
Revolving Loans, charge-off	4,121	0
Total	13,868,357	7,697,087
Total, gross write-offs	31,835	19,566
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total	11,993,345	6,764,070
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,399,056	756,610
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total	291,506	92,296
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total	135,803	62,023
Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total	48,647	22,088
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	11,138,488	5,552,288
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total	9,288,981	4,635,264
Commercial loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,391,562	747,202
Commercial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total	284,810	91,414
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total	127,212	59,480
Commercial loans | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total	45,923	18,928
Commercial loans | C&I and other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	271,734	376,534
2025 / 2024, charge-off	0	0
2024 / 2023	690,703	206,282
2024 /2023, charge-off	0	14,980
2023 / 2022	425,704	215,489
2023 / 2022, charge-off	2,221	148
2022 / 2021	388,982	144,671
2022 / 2021, charge-off	114	22
2021 / 2020	251,053	76,789
2021 / 2020, charge-off	13,591	0
Prior	239,591	144,014
Prior, charge-off	11,174	303
Revolving Loans	2,245,776	740,736
Revolving Loans, charge-off	4,121	0
Total	4,513,543	1,904,515
Total, gross write-offs	31,221	15,453
Commercial loans | C&I and other commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	220,082	320,831
2024 / 2023	592,425	147,909
2023 / 2022	327,725	163,870
2022 / 2021	295,521	125,053
2021 / 2020	203,737	74,146
Prior	204,373	117,234
Revolving Loans	1,921,882	596,295
Total	3,765,745	1,545,338
Commercial loans | C&I and other commercial | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	44,966	38,734
2024 / 2023	64,433	49,394
2023 / 2022	61,625	44,709
2022 / 2021	60,613	16,393
2021 / 2020	37,935	2,175
Prior	23,765	20,964
Revolving Loans	207,368	109,055
Total	500,705	281,424
Commercial loans | C&I and other commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	1,341	1,718
2024 / 2023	13,555	2,293
2023 / 2022	14,331	5,658
2022 / 2021	30,667	2,634
2021 / 2020	3,836	106
Prior	2,628	2,540
Revolving Loans	54,963	21,203
Total	121,321	36,152
Commercial loans | C&I and other commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	5,248	15,186
2024 / 2023	17,351	6,545
2023 / 2022	21,219	788
2022 / 2021	963	591
2021 / 2020	5,349	320
Prior	4,047	2,424
Revolving Loans	33,390	11,895
Total	87,567	37,749
Commercial loans | C&I and other commercial | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	97	65
2024 / 2023	2,939	141
2023 / 2022	804	464
2022 / 2021	1,218	0
2021 / 2020	196	42
Prior	4,778	852
Revolving Loans	28,173	2,288
Total	38,205	3,852
Commercial loans | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	233,506	467,816
2025 / 2024, charge-off	0	0
2024 / 2023	651,437	488,528
2024 /2023, charge-off	0	0
2023 / 2022	716,307	828,525
2023 / 2022, charge-off	0	0
2022 / 2021	1,216,735	709,847
2022 / 2021, charge-off	0	2,999
2021 / 2020	978,705	389,461
2021 / 2020, charge-off	253	0
Prior	934,707	358,936
Prior, charge-off	0	315
Revolving Loans	842,369	26,451
Revolving Loans, charge-off	0	0
Total	5,573,766	3,269,564
Total, gross write-offs	253	3,314
Commercial loans | CRE | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	186,098	291,503
2024 / 2023	448,045	354,591
2023 / 2022	590,920	755,266
2022 / 2021	1,078,055	645,994
2021 / 2020	807,404	356,867
Prior	792,088	314,340
Revolving Loans	668,868	25,457
Total	4,571,478	2,744,018
Commercial loans | CRE | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	25,271	115,078
2024 / 2023	157,620	132,900
2023 / 2022	118,044	60,611
2022 / 2021	112,461	62,408
2021 / 2020	146,922	28,320
Prior	116,367	38,733
Revolving Loans	146,156	895
Total	822,841	438,945
Commercial loans | CRE | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	19,377	39,252
2024 / 2023	28,666	643
2023 / 2022	1,189	8,020
2022 / 2021	21,721	1,395
2021 / 2020	24,376	4,165
Prior	14,699	1,517
Revolving Loans	27,345	49
Total	137,373	55,041
Commercial loans | CRE | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	2,760	6,983
2024 / 2023	17,106	355
2023 / 2022	1,609	4,628
2022 / 2021	4,498	50
2021 / 2020	0	95
Prior	8,402	4,346
Revolving Loans	0	50
Total	34,375	16,507
Commercial loans | CRE | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0	15,000
2024 / 2023	0	39
2023 / 2022	4,545	0
2022 / 2021	0	0
2021 / 2020	3	14
Prior	3,151	0
Revolving Loans	0	0
Total	7,699	15,053
Commercial loans | Real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	128,313	185,219
2025 / 2024, charge-off	0	0
2024 / 2023	402,652	140,905
2024 /2023, charge-off	0	0
2023 / 2022	196,435	12,205
2023 / 2022, charge-off	0	0
2022 / 2021	224,388	25,233
2022 / 2021, charge-off	0	0
2021 / 2020	49,221	2,213
2021 / 2020, charge-off	0	0
Prior	4,649	1,124
Prior, charge-off	0	0
Revolving Loans	45,521	11,310
Revolving Loans, charge-off	0	0
Total	1,051,179	378,209
Total, gross write-offs	0	0
Commercial loans | Real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	103,765	159,825
2024 / 2023	373,395	134,450
2023 / 2022	194,079	12,205
2022 / 2021	210,403	24,781
2021 / 2020	21,948	2,213
Prior	4,649	1,124
Revolving Loans	43,519	11,310
Total	951,758	345,908
Commercial loans | Real estate construction | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	938	20,170
2024 / 2023	29,257	6,455
2023 / 2022	2,356	0
2022 / 2021	13,368	208
2021 / 2020	20,095	0
Prior	0	0
Revolving Loans	2,002	0
Total	68,016	26,833
Commercial loans | Real estate construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	18,402	0
2024 / 2023	0	0
2023 / 2022	0	0
2022 / 2021	617	221
2021 / 2020	7,097	0
Prior	0	0
Revolving Loans	0	0
Total	26,116	221
Commercial loans | Real estate construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	5,208	5,224
2024 / 2023	0	0
2023 / 2022	0	0
2022 / 2021	0	0
2021 / 2020	62	0
Prior	0	0
Revolving Loans	0	0
Total	5,270	5,224
Commercial loans | Real estate construction | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0	0
2024 / 2023	0	0
2023 / 2022	0	0
2022 / 2021	0	23
2021 / 2020	19	0
Prior	0	0
Revolving Loans	0	0
Total	19	23
Retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,729,869	2,144,799
Retail loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,704,364	2,128,806
Retail loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Total	7,494	9,408
Retail loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total	6,696	882
Retail loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total	8,591	2,543
Retail loans | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,724	3,160
Retail loans | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	36,929	102,988
2025 / 2024, charge-off	0	0
2024 / 2023	141,934	238,099
2024 /2023, charge-off	0	0
2023 / 2022	331,126	371,259
2023 / 2022, charge-off	0	0
2022 / 2021	479,213	358,351
2022 / 2021, charge-off	0	0
2021 / 2020	415,027	148,260
2021 / 2020, charge-off	0	0
Prior	577,083	270,229
Prior, charge-off	0	168
Revolving Loans	264,393	207,271
Revolving Loans, charge-off	0	0
Total	2,245,705	1,696,457
Total, gross write-offs	0	168
Retail loans | CRE | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	36,881	101,582
2024 / 2023	139,739	237,306
2023 / 2022	326,479	366,820
2022 / 2021	474,276	354,380
2021 / 2020	411,108	147,236
Prior	572,418	267,431
Revolving Loans	259,724	205,885
Total	2,220,625	1,680,640
Retail loans | CRE | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	48	1,255
2024 / 2023	2,051	550
2023 / 2022	530	2,733
2022 / 2021	2,179	3,377
2021 / 2020	578	872
Prior	1,290	124
Revolving Loans	668	497
Total	7,344	9,408
Retail loans | CRE | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0	151
2024 / 2023	144	0
2023 / 2022	3,883	344
2022 / 2021	950	0
2021 / 2020	1,669	0
Prior	0	372
Revolving Loans	50	15
Total	6,696	882
Retail loans | CRE | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0	0
2024 / 2023	0	243
2023 / 2022	234	1,018
2022 / 2021	1,311	503
2021 / 2020	1,581	0
Prior	2,095	776
Revolving Loans	3,189	3
Total	8,410	2,543
Retail loans | CRE | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0	0
2024 / 2023	0	0
2023 / 2022	0	344
2022 / 2021	497	91
2021 / 2020	91	152
Prior	1,280	1,526
Revolving Loans	762	871
Total	2,630	2,984
Retail loans | Retail other
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	1,555	4,996
2025 / 2024, charge-off	0	9
2024 / 2023	10,814	55,759
2024 /2023, charge-off	147	31
2023 / 2022	52,162	58,011
2023 / 2022, charge-off	105	106
2022 / 2021	51,352	12,211
2022 / 2021, charge-off	35	78
2021 / 2020	10,308	2,304
2021 / 2020, charge-off	0	4
Prior	2,000	600
Prior, charge-off	74	403
Revolving Loans	355,973	314,461
Revolving Loans, charge-off	0	0
Total	484,164	448,342
Total, gross write-offs	361	631
Retail loans | Retail other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	1,555	4,996
2024 / 2023	10,814	55,665
2023 / 2022	52,162	57,944
2022 / 2021	51,269	12,207
2021 / 2020	10,288	2,304
Prior	1,978	589
Revolving Loans	355,673	314,461
Total	483,739	448,166
Retail loans | Retail other | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0
2024 / 2023	0
2023 / 2022	0
2022 / 2021	0
2021 / 2020	0
Prior	0
Revolving Loans	150
Total	150	0
Retail loans | Retail other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0
2024 / 2023	0
2023 / 2022	0
2022 / 2021	0
2021 / 2020	0
Prior	0
Revolving Loans	0
Total	0	0
Retail loans | Retail other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0
2024 / 2023	0
2023 / 2022	0
2022 / 2021	0
2021 / 2020	20
Prior	11
Revolving Loans	150
Total	181	0
Retail loans | Retail other | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2025 / 2024	0	0
2024 / 2023	0	94
2023 / 2022	0	67
2022 / 2021	83	4
2021 / 2020	0	0
Prior	11	11
Revolving Loans	0	0
Total	$ 94	$ 176