Loans Receivable and Allowance for Credit Losses - Schedule Of Loans Held-For-Investment By Loan Portfolio Segments, Internal Risk Ratings, Gross Write-Offs And Vintage Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	$ 7,211,782	$ 9,030,294
Year 2	7,563,807	10,960,065
Year 3	9,549,557	6,936,329
Year 4	5,603,650	4,082,547
Year 5	3,663,285	3,402,102
Prior	7,419,863	5,723,462
Revolving Loans	12,520,741	11,860,890
Revolving Loans Converted to Term Loans	193,952	215,093
Total	53,726,637	52,210,782
Gross write-offs Total	146,257	54,372	$ 37,920
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	7,127,517	8,877,690
Year 2	7,422,477	10,839,026
Year 3	9,316,206	6,723,921
Year 4	5,414,088	4,010,720
Year 5	3,567,683	3,326,731
Prior	7,175,711	5,504,224
Revolving Loans	12,356,727	11,739,785
Revolving Loans Converted to Term Loans	173,075	210,475
Total	52,553,484	51,232,572
Pass | Federal Housing Administration Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual loans	1,000	1,000
Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	74,566	145,219
Year 2	99,381	111,430
Year 3	197,313	207,962
Year 4	176,822	64,855
Year 5	87,799	67,738
Prior	209,605	158,049
Revolving Loans	154,085	119,744
Revolving Loans Converted to Term Loans	15,365	1,089
Total	1,014,936	876,086
Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	9,699	7,385
Year 2	41,949	9,609
Year 3	36,038	4,446
Year 4	12,740	6,972
Year 5	7,803	7,633
Prior	34,547	61,189
Revolving Loans	9,929	1,361
Revolving Loans Converted to Term Loans	5,512	3,529
Total	158,217	102,124
Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	29	350
Gross write-offs year 2	50,973	10,454
Gross write-offs year 3	17,137	424
Gross write-offs year 4	11,119	3,758
Gross write-offs year 5	1,568	9,748
Gross write-offs year Prior	3,025	4,021
Gross write-offs year Revolving Loans	27,989	1,593
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	111,845	30,354
Consumer Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Converted to term loan	22,000	44,000	0
Commercial lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	4,817,251	5,827,011
Year 2	4,781,421	7,589,913
Year 3	6,441,207	4,647,905
Year 4	3,513,075	2,481,175
Year 5	2,244,179	2,414,789
Prior	4,939,166	3,719,778
Revolving Loans	10,847,445	10,280,425
Revolving Loans Converted to Term Loans	88,358	84,195
Total	37,672,102	37,045,191
Converted to term loan	7,000	29,000	26,000
Commercial lending | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	20	350
Gross write-offs year 2	47,963	10,454
Gross write-offs year 3	17,137	424
Gross write-offs year 4	11,119	3,758
Gross write-offs year 5	1,568	9,748
Gross write-offs year Prior	3,025	3,980
Gross write-offs year Revolving Loans	27,099	1,593
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	107,931	30,307
Commercial lending | C&I
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,644,162	2,421,686
Year 2	1,589,544	1,704,375
Year 3	1,080,900	1,417,641
Year 4	730,036	351,865
Year 5	257,291	289,072
Prior	336,179	204,394
Revolving Loans	10,736,014	10,171,903
Revolving Loans Converted to Term Loans	23,032	20,143
Total	17,397,158	16,581,079
Gross write-offs Total	125,413	36,573	18,738
Commercial lending | C&I | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,605,928	2,314,463
Year 2	1,508,948	1,628,560
Year 3	999,586	1,296,936
Year 4	612,015	331,982
Year 5	243,528	245,173
Prior	295,884	164,159
Revolving Loans	10,574,404	10,053,757
Revolving Loans Converted to Term Loans	23,032	20,143
Total	16,863,325	16,055,173
Commercial lending | C&I | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	34,412	105,119
Year 2	51,415	67,899
Year 3	61,041	120,574
Year 4	107,355	15,064
Year 5	10,538	40,920
Prior	31,160	22,098
Revolving Loans	151,747	117,196
Revolving Loans Converted to Term Loans	0	0
Total	447,668	488,870
Commercial lending | C&I | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,822	2,104
Year 2	29,181	7,916
Year 3	20,273	131
Year 4	10,666	4,819
Year 5	3,225	2,979
Prior	9,135	18,137
Revolving Loans	9,863	950
Revolving Loans Converted to Term Loans	0	0
Total	86,165	37,036
Commercial lending | C&I | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	20	350
Gross write-offs year 2	47,963	10,454
Gross write-offs year 3	14,848	424
Gross write-offs year 4	11,119	3,758
Gross write-offs year 5	1,568	9,748
Gross write-offs year Prior	3,012	2,648
Gross write-offs year Revolving Loans	27,099	1,593
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	105,629	28,975
Commercial lending | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,695,420	2,529,770
Year 2	2,341,320	4,120,870
Year 3	3,782,603	2,246,593
Year 4	1,956,835	1,476,974
Year 5	1,373,773	1,625,725
Prior	3,344,525	2,621,527
Revolving Loans	96,791	92,851
Revolving Loans Converted to Term Loans	64,073	62,771
Total	14,655,340	14,777,081
Gross write-offs Total	14,236	7,048	10,871
Commercial lending | CRE | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,660,877	2,492,915
Year 2	2,296,763	4,086,385
Year 3	3,692,498	2,216,257
Year 4	1,925,220	1,428,724
Year 5	1,296,439	1,600,844
Prior	3,176,450	2,494,382
Revolving Loans	96,791	92,851
Revolving Loans Converted to Term Loans	49,302	62,771
Total	14,194,340	14,475,129
Commercial lending | CRE | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	34,543	36,855
Year 2	44,557	34,485
Year 3	90,105	30,336
Year 4	31,615	48,250
Year 5	75,578	24,437
Prior	167,401	104,340
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	14,771	0
Total	458,570	278,703
Commercial lending | CRE | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	1,756	444
Prior	674	22,805
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	2,430	23,249
Commercial lending | CRE | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	0
Gross write-offs year 2	0	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	3	1,329
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	3	1,329
Commercial lending | Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	386,743	665,780
Year 2	521,754	1,484,517
Year 3	1,381,596	862,947
Year 4	784,272	612,408
Year 5	613,115	499,184
Prior	1,250,069	888,356
Revolving Loans	14,640	8,690
Revolving Loans Converted to Term Loans	1,253	1,281
Total	4,953,442	5,023,163
Gross write-offs Total	10	3	7,237
Commercial lending | Multifamily Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	386,743	665,780
Year 2	521,754	1,481,161
Year 3	1,337,599	808,333
Year 4	752,230	612,408
Year 5	613,115	498,491
Prior	1,242,586	857,713
Revolving Loans	14,640	8,690
Revolving Loans Converted to Term Loans	1,253	1,281
Total	4,869,920	4,933,857
Commercial lending | Multifamily Residential | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	3,356
Year 3	43,997	54,614
Year 4	32,042	0
Year 5	0	693
Prior	2,911	25,974
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	78,950	84,637
Commercial lending | Multifamily Residential | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	4,572	4,669
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	4,572	4,669
Commercial lending | Multifamily Residential | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	0
Gross write-offs year 2	0	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	10	3
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	10	3
Commercial lending | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	90,926	209,775
Year 2	328,803	280,151
Year 3	196,108	120,724
Year 4	41,932	39,928
Year 5	0	808
Prior	8,393	5,501
Revolving Loans	0	6,981
Revolving Loans Converted to Term Loans	0	0
Total	666,162	663,868
Gross write-offs Total	2,289	10,413	0
Commercial lending | Construction and land | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	90,926	209,775
Year 2	328,803	280,151
Year 3	184,792	120,724
Year 4	41,932	39,928
Year 5	0	808
Prior	8,393	5,501
Revolving Loans	0	6,981
Revolving Loans Converted to Term Loans	0	0
Total	654,846	663,868
Commercial lending | Construction and land | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0
Year 2	0
Year 3	11,316
Year 4	0
Year 5	0
Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total	11,316
Commercial lending | Construction and land | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0
Gross write-offs year 2	0
Gross write-offs year 3	2,289
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	0
Gross write-offs year Revolving Loans	0
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	2,289
Commercial lending | Total CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,173,089	3,405,325
Year 2	3,191,877	5,885,538
Year 3	5,360,307	3,230,264
Year 4	2,783,039	2,129,310
Year 5	1,986,888	2,125,717
Prior	4,602,987	3,515,384
Revolving Loans	111,431	108,522
Revolving Loans Converted to Term Loans	65,326	64,052
Total	20,274,944	20,464,112
Gross write-offs year 1	0
Gross write-offs year 2	0
Gross write-offs year 3	2,289
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	13
Gross write-offs year Revolving Loans	0
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	2,302
Commercial lending | Total CRE | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1		0
Gross write-offs year 2		0
Gross write-offs year 3		0
Gross write-offs year 4		0
Gross write-offs year 5		0
Gross write-offs year Prior		1,332
Gross write-offs year Revolving Loans		0
Gross write-offs Revolving Loans Converted to Term Loans		0
Gross write-offs Total		1,332
Consumer Lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,394,531	3,203,283
Year 2	2,782,386	3,370,152
Year 3	3,108,350	2,288,424
Year 4	2,090,575	1,601,372
Year 5	1,419,106	987,313
Prior	2,480,697	2,003,684
Revolving Loans	1,673,296	1,580,465
Revolving Loans Converted to Term Loans	105,594	130,898
Total	16,054,535	15,165,591
Consumer Lending | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	9	0
Gross write-offs year 2	3,010	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	0	41
Gross write-offs year Revolving Loans	890	0
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	3,914	47
Consumer Lending | Single-Family Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,367,565	3,195,976
Year 2	2,776,003	3,346,097
Year 3	3,077,347	2,284,270
Year 4	2,087,168	1,598,046
Year 5	1,410,983	985,815
Prior	2,456,380	1,972,856
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	14,175,446	13,383,060
Gross write-offs Total	35	0	775
Consumer Lending | Single-Family Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,360,674	3,188,830
Year 2	2,762,921	3,340,789
Year 3	3,074,668	2,279,802
Year 4	2,079,323	1,594,525
Year 5	1,407,031	980,686
Prior	2,437,446	1,959,974
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	14,122,063	13,344,606
Consumer Lending | Single-Family Residential | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	4,175	2,680
Year 2	3,409	4,471
Year 3	750	566
Year 4	5,810	1,440
Year 5	1,548	1,503
Prior	6,069	4,167
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	21,761	14,827
Consumer Lending | Single-Family Residential | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,716	4,466
Year 2	9,673	837
Year 3	1,929	3,902
Year 4	2,035	2,081
Year 5	2,404	3,626
Prior	12,865	8,715
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	31,622	23,627
Consumer Lending | Single-Family Residential | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	9
Gross write-offs year 2	0
Gross write-offs year 3	0
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	0
Gross write-offs year Revolving Loans	0
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	9
Consumer Lending | HELOCs
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	12,050	5,021
Year 2	6,383	5,957
Year 3	8,011	4,019
Year 4	3,275	3,326
Year 5	8,123	1,498
Prior	17,517	17,584
Revolving Loans	1,650,675	1,553,901
Revolving Loans Converted to Term Loans	105,594	130,898
Total	1,811,628	1,722,204
Gross write-offs Total	15	138	193
Consumer Lending | HELOCs | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	7,453	3,641
Year 2	3,288	3,882
Year 3	4,071	1,734
Year 4	3,236	3,153
Year 5	7,570	729
Prior	8,152	9,251
Revolving Loans	1,648,337	1,551,074
Revolving Loans Converted to Term Loans	99,488	126,280
Total	1,781,595	1,699,744
Consumer Lending | HELOCs | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,436	565
Year 2	0	1,219
Year 3	1,420	1,872
Year 4	0	101
Year 5	135	185
Prior	2,064	1,470
Revolving Loans	2,338	2,548
Revolving Loans Converted to Term Loans	594	1,089
Total	7,987	9,049
Consumer Lending | HELOCs | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,161	815
Year 2	3,095	856
Year 3	2,520	413
Year 4	39	72
Year 5	418	584
Prior	7,301	6,863
Revolving Loans	0	279
Revolving Loans Converted to Term Loans	5,512	3,529
Total	22,046	13,411
Consumer Lending | HELOCs | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	0
Gross write-offs year 2	10	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	0	41
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	15	47
Consumer Lending | Total residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,379,615	3,200,997
Year 2	2,782,386	3,352,054
Year 3	3,085,358	2,288,289
Year 4	2,090,443	1,601,372
Year 5	1,419,106	987,313
Prior	2,473,897	1,990,440
Revolving Loans	1,650,675	1,553,901
Revolving Loans Converted to Term Loans	105,594	130,898
Total	15,987,074	15,105,264
Consumer Lending | Total residential mortgage | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	9	0
Gross write-offs year 2	10	0
Gross write-offs year 3	0	0
Gross write-offs year 4	0	0
Gross write-offs year 5	0	0
Gross write-offs year Prior	0	41
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	5	6
Gross write-offs Total	24	47
Consumer Lending | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	14,916	2,286
Year 2	0	18,098
Year 3	22,992	135
Year 4	132	0
Year 5	0	0
Prior	6,800	13,244
Revolving Loans	22,621	26,564
Revolving Loans Converted to Term Loans	0	0
Total	67,461	60,327
Gross write-offs Total	4,259	197	$ 106
Consumer Lending | Other consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	14,916	2,286
Year 2	0	18,098
Year 3	22,992	135
Year 4	132	0
Year 5	0	0
Prior	6,800	13,244
Revolving Loans	22,555	26,432
Revolving Loans Converted to Term Loans	0	0
Total	67,395	60,195
Consumer Lending | Other consumer | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Revolving Loans	66	132
Revolving Loans Converted to Term Loans	0	0
Total	66	$ 132
Consumer Lending | Other consumer | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0
Gross write-offs year 2	3,000
Gross write-offs year 3	0
Gross write-offs year 4	0
Gross write-offs year 5	0
Gross write-offs year Prior	0
Gross write-offs year Revolving Loans	890
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	$ 3,890