Loans Receivable and Allowance for Credit Losses - Loans Receivable by Credit Quality Risk Rating Indicator- Prior Year (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 1,815,804	$ 1,506,562
2022	2,530,609	1,910,013
2021	3,858,999	1,615,910
2020	2,390,393	1,181,963
2019	1,979,397	963,225
Prior to 2019	4,380,357	2,868,925
Revolving Loans	1,610,946	716,838
Revolving loans to term loans	101,065	119,462
Total Loans	18,667,570	10,882,898
Total criticized and classified
Financing Receivable, Credit Quality Indicator [Line Items]
2023	10,894	11,882
2022	16,924	27,934
2021	87,250	32,648
2020	57,656	40,155
2019	68,367	12,753
Prior to 2019	195,629	81,269
Revolving Loans	57,953	39,570
Revolving loans to term loans	6,507	1,285
Total Loans	501,180	247,496
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	963	450
2022	9,409	27,934
2021	13,581	12,386
2020	14,931	30,920
2019	24,186	10,710
Prior to 2019	115,866	58,155
Revolving Loans	25,216	28,011
Revolving loans to term loans	4,761	687
Total Loans	208,913	169,253
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023	9,931	4,421
2022	7,515	0
2021	73,669	20,262
2020	42,725	9,235
2019	44,181	2,043
Prior to 2019	79,763	23,114
Revolving Loans	32,737	11,559
Revolving loans to term loans	1,746	598
Total Loans	292,267	71,232
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	7,011
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	7,011
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,804,910	1,494,680
2022	2,513,685	1,882,079
2021	3,771,749	1,583,262
2020	2,332,737	1,141,808
2019	1,911,030	950,472
Prior to 2019	4,184,728	2,787,656
Revolving Loans	1,552,993	677,268
Revolving loans to term loans	94,558	118,177
Total Loans	18,166,390	10,635,402
Mortgage Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,029,345	1,110,754
2022	2,049,829	1,550,892
2021	3,036,316	1,249,793
2020	1,925,522	1,035,213
2019	1,680,796	802,978
Prior to 2019	3,569,951	2,257,828
Revolving Loans	140,939	101,809
Revolving loans to term loans	12,453	33,846
Total Loans	13,445,151	8,143,113
Mortgage Portfolio Segment \| Total criticized and classified
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,709	3,735
2022	9,194	10,926
2021	22,135	3,048
2020	23,635	28,511
2019	35,620	10,558
Prior to 2019	147,105	46,961
Revolving Loans	4,461	4,934
Revolving loans to term loans	0	0
Total Loans	245,859	108,673
Mortgage Portfolio Segment \| Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	665	0
2022	6,797	10,926
2021	10,494	3,048
2020	9,127	28,511
2019	14,569	10,558
Prior to 2019	88,833	35,306
Revolving Loans	4,461	4,500
Revolving loans to term loans	0	0
Total Loans	134,946	92,849
Mortgage Portfolio Segment \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,044	3,735
2022	2,397	0
2021	11,641	0
2020	14,508	0
2019	21,051	0
Prior to 2019	58,272	11,655
Revolving Loans	0	434
Revolving loans to term loans	0	0
Total Loans	110,913	15,824
Mortgage Portfolio Segment \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Mortgage Portfolio Segment \| Loss
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Mortgage Portfolio Segment \| Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,025,636	1,107,019
2022	2,040,635	1,539,966
2021	3,014,181	1,246,745
2020	1,901,887	1,006,702
2019	1,645,176	792,420
Prior to 2019	3,422,846	2,210,867
Revolving Loans	136,478	96,875
Revolving loans to term loans	12,453	33,846
Total Loans	13,199,292	8,034,440
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	754,484	366,725
2022	435,080	333,023
2021	763,011	348,016
2020	424,782	143,291
2019	289,044	145,863
Prior to 2019	726,248	525,471
Revolving Loans	1,141,225	506,031
Revolving loans to term loans	74,726	72,201
Total Loans	4,608,600	2,440,621
Commercial loans \| Total criticized and classified
Financing Receivable, Credit Quality Indicator [Line Items]
2023	7,185	8,147
2022	7,635	17,008
2021	65,112	29,600
2020	34,012	11,644
2019	32,623	2,186
Prior to 2019	48,094	34,065
Revolving Loans	51,817	34,069
Revolving loans to term loans	6,507	1,195
Total Loans	252,985	137,914
Commercial loans \| Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	298	450
2022	2,612	17,008
2021	3,084	9,338
2020	5,804	2,409
2019	9,493	152
Prior to 2019	26,924	22,752
Revolving Loans	20,030	23,333
Revolving loans to term loans	4,761	687
Total Loans	73,006	76,129
Commercial loans \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023	6,887	686
2022	5,023	0
2021	62,028	20,262
2020	28,208	9,235
2019	23,130	2,034
Prior to 2019	21,170	11,313
Revolving Loans	31,787	10,736
Revolving loans to term loans	1,746	508
Total Loans	179,979	54,774
Commercial loans \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	7,011
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	7,011
Commercial loans \| Loss
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Commercial loans \| Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023	747,299	358,578
2022	427,445	316,015
2021	697,899	318,416
2020	390,770	131,647
2019	256,421	143,677
Prior to 2019	678,154	491,406
Revolving Loans	1,089,408	471,962
Revolving loans to term loans	68,219	71,006
Total Loans	4,355,615	2,302,707
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	31,975	29,083
2022	45,700	26,098
2021	59,672	18,101
2020	40,089	3,459
2019	9,557	14,384
Prior to 2019	84,158	85,626
Revolving Loans	328,782	108,998
Revolving loans to term loans	13,886	13,415
Total Loans	613,819	299,164
Consumer loans \| Total criticized and classified
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	95	0
2021	3	0
2020	9	0
2019	124	9
Prior to 2019	430	243
Revolving Loans	1,675	567
Revolving loans to term loans	0	90
Total Loans	2,336	909
Consumer loans \| Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	3	0
2020	0	0
2019	124	0
Prior to 2019	109	97
Revolving Loans	725	178
Revolving loans to term loans	0	0
Total Loans	961	275
Consumer loans \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	95	0
2021	0	0
2020	9	0
2019	0	9
Prior to 2019	321	146
Revolving Loans	950	389
Revolving loans to term loans	0	90
Total Loans	1,375	634
Consumer loans \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Consumer loans \| Loss
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Consumer loans \| Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023	31,975	29,083
2022	45,605	26,098
2021	59,669	18,101
2020	40,080	3,459
2019	9,433	14,375
Prior to 2019	83,728	85,383
Revolving Loans	327,107	108,431
Revolving loans to term loans	13,886	13,325
Total Loans	611,483	298,255
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2023	421,297	629,191
2022	909,374	894,075
2021	1,645,013	680,512
2020	1,006,785	498,768
2019	919,915	481,529
Prior to 2019	2,184,041	1,200,402
Revolving Loans	130,758	95,694
Revolving loans to term loans	10,895	32,240
Total Loans	7,228,078	4,512,411
Commercial \| Total criticized and classified
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,306	482
2022	4,450	10,926
2021	21,102	3,048
2020	9,127	28,511
2019	35,620	10,558
Prior to 2019	120,395	34,197
Revolving Loans	4,461	4,934
Revolving loans to term loans	0	0
Total Loans	198,461	92,656
Commercial \| Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	262	0
2022	4,377	10,926
2021	10,150	3,048
2020	9,127	28,511
2019	14,569	10,558
Prior to 2019	69,525	24,598
Revolving Loans	4,461	4,500
Revolving loans to term loans	0	0
Total Loans	112,471	82,141
Commercial \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023	3,044	482
2022	73	0
2021	10,952	0
2020	0	0
2019	21,051	0
Prior to 2019	50,870	9,599
Revolving Loans	0	434
Revolving loans to term loans	0	0
Total Loans	85,990	10,515
Commercial \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Commercial \| Loss
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Commercial \| Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023	417,991	628,709
2022	904,924	883,149
2021	1,623,911	677,464
2020	997,658	470,257
2019	884,295	470,971
Prior to 2019	2,063,646	1,166,205
Revolving Loans	126,297	90,760
Revolving loans to term loans	10,895	32,240
Total Loans	7,029,617	4,419,755
Commercial \| Mortgage Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	7,228,078	4,512,411
Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
2023	363,254	344,095
2022	479,744	172,244
2021	701,811	184,136
2020	462,022	271,878
2019	460,161	230,456
Prior to 2019	904,202	601,970
Revolving Loans	10,181	6,115
Revolving loans to term loans	1,558	1,606
Total Loans	3,382,933	1,812,500
Multi-family \| Total criticized and classified
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	3,253
2022	1,560	0
2021	0	0
2020	1,043	0
2019	0	0
Prior to 2019	21,911	9,500
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	24,514	12,753
Multi-family \| Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	16,472	9,500
Revolving Loans		0
Revolving loans to term loans		0
Total Loans	16,472	9,500
Multi-family \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	3,253
2022	1,560	0
2021	0	0
2020	1,043	0
2019	0	0
Prior to 2019	5,439	0
Revolving Loans		0
Revolving loans to term loans		0
Total Loans	8,042	3,253
Multi-family \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Multi-family \| Loss
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	0	0
Multi-family \| Pass/Watch
Financing Receivable, Credit Quality Indicator [Line Items]
2023	363,254	340,842
2022	478,184	172,244
2021	701,811	184,136
2020	460,979	271,878
2019	460,161	230,456
Prior to 2019	882,291	592,470
Revolving Loans	10,181	6,115
Revolving loans to term loans	1,558	1,606
Total Loans	3,358,419	1,799,747
Multi-family \| Mortgage Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	3,382,933	1,812,500
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2023	104,009	41,209
2022	310,098	342,890
2021	260,190	185,034
2020	122,446	68,603
2019	24,017	1,339
Prior to 2019	2,743	14,171
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	823,503	653,246
Construction \| Total criticized and classified
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	1,064	0
2021	0	0
2020	12,346	0
2019	0	0
Prior to 2019	0	771
Revolving Loans	0	0
Revolving loans to term loans	0	0
Total Loans	13,410	771
Construction \| Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0	0
2022	1,064	0
2021	0	0
2020	0	0
2019	0	0
Prior to 2019	0	0
Revolving Loans		0
Revolving loans to term loans		0
Total Loans	1,064	0

Loans Receivable and Allowance for Credit Losses - Loans Receivable by Credit Quality Risk Rating Indicator- Prior Year (Details) - USD ($)
$ in Thousands