PORTFOLIO LOANS - Schedule of Risk Grades of Portfolio Loans, Further Sorted by Origination (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	$ 633,302	$ 1,520,323
2024 / 2023, charge-off	0	289
2023 / 2022	1,295,578	1,785,798
2023 /2022, charge-off	15,010	76
2022 / 2021	1,678,101	1,552,072
2022 / 2021, charge-off	37	592
2021 / 2020	1,435,405	705,335
2021 / 2020, charge-off	45	34
2020 / 2019	670,151	468,659
2020 / 2019, charge-off	0	391
Prior	975,188	660,624
Prior, charge-off	644	3,036
Revolving Loans	1,311,187	958,223
Revolving Loans, charge-off	0	0
Total	7,998,912	7,651,034
Total, gross write-offs	15,736	4,418
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total	7,038,785	6,736,067
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Total	743,579	747,122
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total	121,576	96,057
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total	86,579	64,347
Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total	8,393	7,441
C&I and other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	188,288	394,854
2024 / 2023, charge-off	0	284
2023 / 2022	293,307	295,539
2023 /2022, charge-off	14,980	0
2022 / 2021	262,832	184,527
2022 / 2021, charge-off	0	420
2021 / 2020	165,751	96,530
2021 / 2020, charge-off	22	0
2020 / 2019	85,946	47,510
2020 / 2019, charge-off	0	316
Prior	177,563	169,911
Prior, charge-off	229	1,409
Revolving Loans	769,287	647,123
Revolving Loans, charge-off	0	0
Total	1,942,974	1,835,994
Total, gross write-offs	15,231	2,429
C&I and other commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	158,137	306,578
2023 / 2022	237,806	220,847
2022 / 2021	205,421	159,130
2021 / 2020	142,433	71,025
2020 / 2019	82,415	35,927
Prior	138,626	143,078
Revolving Loans	637,046	526,170
Total	1,601,884	1,462,755
C&I and other commercial | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	20,444	78,603
2023 / 2022	47,563	65,703
2022 / 2021	49,890	21,421
2021 / 2020	19,704	23,919
2020 / 2019	2,340	7,035
Prior	32,548	21,293
Revolving Loans	74,163	78,442
Total	246,652	296,416
C&I and other commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	1,711	792
2023 / 2022	228	8,224
2022 / 2021	6,400	2,917
2021 / 2020	2,755	1,076
2020 / 2019	598	686
Prior	2,662	3,274
Revolving Loans	32,404	29,519
Total	46,758	46,488
C&I and other commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	7,996	8,715
2023 / 2022	7,638	765
2022 / 2021	1,121	942
2021 / 2020	764	426
2020 / 2019	545	3,734
Prior	2,771	1,859
Revolving Loans	24,974	11,292
Total	45,809	27,733
C&I and other commercial | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0	166
2023 / 2022	72	0
2022 / 2021	0	117
2021 / 2020	95	84
2020 / 2019	48	128
Prior	956	407
Revolving Loans	700	1,700
Total	1,871	2,602
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	260,198	578,595
2024 / 2023, charge-off	0	0
2023 / 2022	548,797	882,350
2023 /2022, charge-off	0	0
2022 / 2021	909,209	844,293
2022 / 2021, charge-off	0	0
2021 / 2020	797,976	441,134
2021 / 2020, charge-off	0	0
2020 / 2019	421,222	344,373
2020 / 2019, charge-off	0	0
Prior	490,863	226,537
Prior, charge-off	100	953
Revolving Loans	17,249	20,055
Revolving Loans, charge-off	0	0
Total	3,445,514	3,337,337
Total, gross write-offs	100	953
Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	154,209	395,644
2023 / 2022	399,685	824,506
2022 / 2021	860,454	720,052
2021 / 2020	667,533	399,195
2020 / 2019	379,415	271,078
Prior	402,137	199,662
Revolving Loans	16,329	16,893
Total	2,879,762	2,827,030
Commercial real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	96,212	166,795
2023 / 2022	140,529	47,070
2022 / 2021	36,174	92,848
2021 / 2020	99,854	34,010
2020 / 2019	32,268	68,196
Prior	57,858	19,396
Revolving Loans	870	3,112
Total	463,765	431,427
Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	7,998	14,313
2023 / 2022	2,896	10,507
2022 / 2021	7,877	12,446
2021 / 2020	12,041	4,968
2020 / 2019	9,061	3,297
Prior	25,829	3,014
Revolving Loans	0	0
Total	65,702	48,545
Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	1,779	1,796
2023 / 2022	2,422	188
2022 / 2021	4,704	18,862
2021 / 2020	18,548	2,938
2020 / 2019	458	1,802
Prior	5,039	3,856
Revolving Loans	50	50
Total	33,000	29,492
Commercial real estate | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0	47
2023 / 2022	3,265	79
2022 / 2021	0	85
2021 / 2020	0	23
2020 / 2019	20	0
Prior	0	609
Revolving Loans	0	0
Total	3,285	843
Real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	133,506	213,138
2024 / 2023, charge-off	0	0
2023 / 2022	133,800	132,868
2023 /2022, charge-off	0	0
2022 / 2021	47,196	85,593
2022 / 2021, charge-off	0	0
2021 / 2020	75,886	2,938
2021 / 2020, charge-off	0	0
2020 / 2019	2,716	1,364
2020 / 2019, charge-off	0	0
Prior	1,753	3,178
Prior, charge-off	0	0
Revolving Loans	15,869	22,638
Revolving Loans, charge-off	0	0
Total	410,726	461,717
Total, gross write-offs	0	0
Real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	115,573	204,952
2023 / 2022	117,742	128,462
2022 / 2021	46,075	85,086
2021 / 2020	75,441	2,616
2020 / 2019	2,398	1,323
Prior	1,753	2,934
Revolving Loans	15,869	22,638
Total	374,851	448,011
Real estate construction | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	17,933	2,859
2023 / 2022	2,637	4,406
2022 / 2021	1,121	507
2021 / 2020	384	322
2020 / 2019	318	41
Prior	0	0
Revolving Loans	0	0
Total	22,393	8,135
Real estate construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0
2023 / 2022	8,145
2022 / 2021	0
2021 / 2020	61
2020 / 2019	0
Prior	0
Revolving Loans	0
Total	8,206	0
Real estate construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0	5,327
2023 / 2022	5,276	0
2022 / 2021	0	0
2021 / 2020	0	0
2020 / 2019	0	0
Prior	0	0
Revolving Loans	0	0
Total	5,276	5,327
Real estate construction | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023		0
2023 / 2022		0
2022 / 2021		0
2021 / 2020		0
2020 / 2019		0
Prior		244
Revolving Loans		0
Total	0	244
Retail real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	48,984	244,851
2024 / 2023, charge-off	0	0
2023 / 2022	246,584	382,017
2023 /2022, charge-off	0	5
2022 / 2021	383,801	414,578
2022 / 2021, charge-off	0	0
2021 / 2020	378,112	158,032
2021 / 2020, charge-off	0	29
2020 / 2019	155,583	70,815
2020 / 2019, charge-off	0	72
Prior	302,801	260,142
Prior, charge-off	127	301
Revolving Loans	211,416	190,020
Revolving Loans, charge-off	0	0
Total	1,727,281	1,720,455
Total, gross write-offs	127	407
Retail real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	47,828	243,400
2023 / 2022	245,613	376,922
2022 / 2021	379,433	411,723
2021 / 2020	373,384	156,762
2020 / 2019	154,426	70,099
Prior	299,617	256,571
Revolving Loans	209,715	187,420
Total	1,710,016	1,702,897
Retail real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	1,156	1,096
2023 / 2022	657	4,137
2022 / 2021	2,827	2,442
2021 / 2020	4,148	954
2020 / 2019	911	536
Prior	348	234
Revolving Loans	722	1,745
Total	10,769	11,144
Retail real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0	286
2023 / 2022	186	358
2022 / 2021	350	0
2021 / 2020	0	0
2020 / 2019	0	0
Prior	374	380
Revolving Loans	0	0
Total	910	1,024
Retail real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0	69
2023 / 2022	128	72
2022 / 2021	1,038	292
2021 / 2020	514	49
2020 / 2019	0	80
Prior	810	997
Revolving Loans	4	236
Total	2,494	1,795
Retail real estate | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0	0
2023 / 2022	0	528
2022 / 2021	153	121
2021 / 2020	66	267
2020 / 2019	246	100
Prior	1,652	1,960
Revolving Loans	975	619
Total	3,092	3,595
Retail other
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	2,326	88,885
2024 / 2023, charge-off	0	5
2023 / 2022	73,090	93,024
2023 /2022, charge-off	30	71
2022 / 2021	75,063	23,081
2022 / 2021, charge-off	37	172
2021 / 2020	17,680	6,701
2021 / 2020, charge-off	23	5
2020 / 2019	4,684	4,597
2020 / 2019, charge-off	0	3
Prior	2,208	856
Prior, charge-off	188	373
Revolving Loans	297,366	78,387
Revolving Loans, charge-off	0	0
Total	472,417	295,531
Total, gross write-offs	278	629
Retail other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	2,326	88,885
2023 / 2022	73,090	92,931
2022 / 2021	74,979	23,019
2021 / 2020	17,631	6,701
2020 / 2019	4,684	4,597
Prior	2,196	854
Revolving Loans	297,366	78,387
Total	472,272	295,374
Retail other | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Retail other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Retail other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Retail other | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
2024 / 2023	0	0
2023 / 2022	0	93
2022 / 2021	84	62
2021 / 2020	49	0
2020 / 2019	0	0
Prior	12	2
Revolving Loans	0	0
Total	$ 145	$ 157