LOANS HELD FOR INVESTMENT, NET - Credit Quality Indicators (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Credit Risk Profile of Real Estate Loans [Abstract]
Total	$ 10,869,328	$ 10,766,837
Pass
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	630,655	922,902
2023/2022	893,740	2,700,103
2022/2021	2,565,490	1,582,274
2021/2020	1,466,647	954,855
2020/2019	922,941	960,030
2019/2018 and Prior	2,858,206	2,257,567
Revolving	896,101	704,128
Revolving-Term	100,957	60,048
Total	10,334,737	10,141,907
Special Mention
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	135	481
2023/2022	754	53,182
2022/2021	37,942	45,366
2021/2020	32,221	92,825
2020/2019	94,307	27,827
2019/2018 and Prior	121,279	70,219
Revolving	26,451	21,267
Revolving-Term	14,497	26,082
Total	327,586	337,249
Substandard
Credit Risk Profile of Real Estate Loans [Abstract]
2023/2022	398	1,857
2022/2021	1,985	2,196
2021/2020	18,953	96,805
2020/2019	39,164	14,483
2019/2018 and Prior	108,772	130,103
Revolving		15,567
Revolving-Term	32,038	20,167
Total	201,310	281,178
Doubtful
Credit Risk Profile of Real Estate Loans [Abstract]
2019/2018 and Prior	611	748
Total	611	748
Excludes Other Loans
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023		923,383
2023/2022		2,755,142
2022/2021		1,629,836
2021/2020		1,144,485
2020/2019		1,002,340
2019/2018 and Prior		2,458,637
Revolving		740,962
Revolving-Term		106,297
Total		10,761,082
Business Loans
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	400,742	259,180
2023/2022	233,169	434,299
2022/2021	365,899	200,169
2021/2020	208,501	165,092
2020/2019	173,111	160,799
2019/2018 and Prior	377,523	339,404
Revolving	854,579	670,394
Revolving-Term	112,202	78,834
Total	2,725,726	2,308,171
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
YTD Gross Charge-Offs 2022/2021	158	77
YTD Gross Charge-Offs 2021/2020	166	38
YTD Gross Charge-Offs 2020/2019	267	4,166
YTD Gross Charge-Offs 2019/2018 and Prior	586	2,229
YTD Gross Charge-Offs Revolving	89	5,464
YTD Gross Charge-Offs Revolving-Term	6,785	3,390
YTD Gross Charge-Offs	8,051	15,364	$ 11,401
Business Loans | Pass
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	400,607	258,699
2023/2022	232,017	390,760
2022/2021	327,174	196,790
2021/2020	201,799	144,796
2020/2019	164,834	150,871
2019/2018 and Prior	348,388	305,258
Revolving	828,287	633,719
Revolving-Term	67,238	35,079
Total	2,570,344	2,115,972
Business Loans | Special Mention
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	135	481
2023/2022	754	41,682
2022/2021	36,740	1,199
2021/2020	4,220	13,567
2020/2019	4,333	7,125
2019/2018 and Prior	17,226	3,150
Revolving	26,292	21,108
Revolving-Term	14,497	25,306
Total	104,197	113,618
Business Loans | Substandard
Credit Risk Profile of Real Estate Loans [Abstract]
2023/2022	398	1,857
2022/2021	1,985	2,180
2021/2020	2,482	6,729
2020/2019	3,944	2,803
2019/2018 and Prior	11,298	30,248
Revolving		15,567
Revolving-Term	30,467	18,449
Total	50,574	77,833
Business Loans | Doubtful
Credit Risk Profile of Real Estate Loans [Abstract]
2019/2018 and Prior	611	748
Total	611	748
One-to-Four Family Residential and Cooperative/Condominium Apartment
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	134,804	170,601
2023/2022	159,300	213,479
2022/2021	202,706	102,684
2021/2020	98,491	70,529
2020/2019	64,077	62,693
2019/2018 and Prior	255,989	221,875
Revolving	26,883	31,364
Revolving-Term	9,278	14,330
Total	951,528	887,555
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
YTD Gross Charge-Offs Revolving-Term		14
YTD Gross Charge-Offs		14
One-to-Four Family Residential and Cooperative/Condominium Apartment | Pass
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	134,804	170,601
2023/2022	159,300	213,479
2022/2021	202,706	102,684
2021/2020	98,491	69,524
2020/2019	63,093	62,356
2019/2018 and Prior	247,952	213,131
Revolving	26,724	31,205
Revolving-Term	8,364	12,493
Total	941,434	875,473
One-to-Four Family Residential and Cooperative/Condominium Apartment | Special Mention
Credit Risk Profile of Real Estate Loans [Abstract]
2019/2018 and Prior	711	33
Revolving	159	159
Revolving-Term		776
Total	870	968
One-to-Four Family Residential and Cooperative/Condominium Apartment | Substandard
Credit Risk Profile of Real Estate Loans [Abstract]
2021/2020		1,005
2020/2019	984	337
2019/2018 and Prior	7,326	8,711
Revolving-Term	914	1,061
Total	9,224	11,114
Multifamily Residential and Residential Mixed-Use
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	21,810	256,822
2023/2022	252,975	1,340,197
2022/2021	1,286,821	587,686
2021/2020	572,408	316,312
2020/2019	300,825	393,912
2019/2018 and Prior	1,376,892	1,113,081
Revolving	4,285	4,841
Revolving-Term	4,267	4,325
Total	3,820,283	4,017,176
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
YTD Gross Charge-Offs 2024/2023	400
YTD Gross Charge-Offs 2020/2019	1,292
YTD Gross Charge-Offs 2019/2018 and Prior	2,985	2
YTD Gross Charge-Offs	4,677	2
Multifamily Residential and Residential Mixed-Use | Pass
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	21,810	256,822
2023/2022	252,975	1,340,197
2022/2021	1,285,619	578,352
2021/2020	560,039	283,633
2020/2019	286,653	384,937
2019/2018 and Prior	1,239,261	981,820
Revolving	4,285	4,841
Revolving-Term	4,267	4,325
Total	3,654,909	3,834,927
Multifamily Residential and Residential Mixed-Use | Special Mention
Credit Risk Profile of Real Estate Loans [Abstract]
2022/2021	1,202	9,334
2021/2020	12,369	3,880
2020/2019	14,172	3,886
2019/2018 and Prior	73,778	64,273
Total	101,521	81,373
Multifamily Residential and Residential Mixed-Use | Substandard
Credit Risk Profile of Real Estate Loans [Abstract]
2021/2020		28,799
2020/2019		5,089
2019/2018 and Prior	63,853	66,988
Total	63,853	100,876
Non-Owner-Occupied Commercial Real Estate
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	57,280	220,045
2023/2022	215,279	738,133
2022/2021	724,041	665,134
2021/2020	618,637	582,652
2020/2019	518,399	370,018
2019/2018 and Prior	1,075,996	783,840
Revolving	11,937	11,919
Revolving-Term	8,966	7,926
Total	3,230,535	3,379,667
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
YTD Gross Charge-Offs 2021/2020	2,797
YTD Gross Charge-Offs 2020/2019	4,033
YTD Gross Charge-Offs Revolving-Term	96
YTD Gross Charge-Offs	6,926
Non-Owner-Occupied Commercial Real Estate | Pass
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	57,280	220,045
2023/2022	215,279	738,133
2022/2021	724,041	645,246
2021/2020	601,508	447,002
2020/2019	408,361	359,201
2019/2018 and Prior	1,020,137	756,921
Revolving	11,937	11,919
Revolving-Term	8,966	7,926
Total	3,047,509	3,186,393
Non-Owner-Occupied Commercial Real Estate | Special Mention
Credit Risk Profile of Real Estate Loans [Abstract]
2022/2021		19,872
2021/2020	658	75,378
2020/2019	75,802	4,563
2019/2018 and Prior	29,564	2,763
Total	106,024	102,576
Non-Owner-Occupied Commercial Real Estate | Substandard
Credit Risk Profile of Real Estate Loans [Abstract]
2022/2021		16
2021/2020	16,471	60,272
2020/2019	34,236	6,254
2019/2018 and Prior	26,295	24,156
Total	77,002	90,698
Non-Owner-Occupied Commercial Real Estate | Real estate loan
Credit Risk Profile of Real Estate Loans [Abstract]
Total	3,230,535	3,379,667
Acquisition, development, and construction ("ADC")
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	16,154	16,735
2023/2022	34,169	29,034
2022/2021	25,950	74,163
2021/2020	19,784	9,900
2020/2019		14,918
2019/2018 and Prior	2,468	437
Revolving	24,868	22,444
Revolving-Term	12,779	882
Total	136,172	168,513
Acquisition, development, and construction ("ADC") | Pass
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	16,154	16,735
2023/2022	34,169	17,534
2022/2021	25,950	59,202
2021/2020	4,810	9,900
2020/2019		2,665
2019/2018 and Prior	2,468	437
Revolving	24,868	22,444
Revolving-Term	12,122	225
Total	120,541	129,142
Acquisition, development, and construction ("ADC") | Special Mention
Credit Risk Profile of Real Estate Loans [Abstract]
2023/2022		11,500
2022/2021		14,961
2021/2020	14,974
2020/2019		12,253
Total	14,974	38,714
Acquisition, development, and construction ("ADC") | Substandard
Credit Risk Profile of Real Estate Loans [Abstract]
Revolving-Term	657	657
Total	657	657
Other Loans
Credit Risk Profile of Real Estate Loans [Abstract]
Total	5,084	5,755
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
YTD Gross Charge-Offs	110	300	$ 53
Other Loans | Credit Risk Profile
Credit Risk Profile of Real Estate Loans [Abstract]
Total	5,084	5,755
Other Loans | Performing | Credit Risk Profile
Credit Risk Profile of Real Estate Loans [Abstract]
Total	5,059	5,755
Other Loans | Non-accrual | Credit Risk Profile
Credit Risk Profile of Real Estate Loans [Abstract]
Total	25
Excludes Other Loans
Credit Risk Profile of Real Estate Loans [Abstract]
2024/2023	630,790
2023/2022	894,892
2022/2021	2,605,417
2021/2020	1,517,821
2020/2019	1,056,412
2019/2018 and Prior	3,088,868
Revolving	922,552
Revolving-Term	147,492
Total	10,864,244
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
YTD Gross Charge-Offs 2024/2023	400
YTD Gross Charge-Offs 2022/2021	158	77
YTD Gross Charge-Offs 2021/2020	2,963	38
YTD Gross Charge-Offs 2020/2019	5,592	4,166
YTD Gross Charge-Offs 2019/2018 and Prior	3,571	2,231
YTD Gross Charge-Offs Revolving	89	5,464
YTD Gross Charge-Offs Revolving-Term	6,881	3,404
YTD Gross Charge-Offs	$ 19,654	$ 15,380