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, 2025	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	$ 9,719,398	$ 7,211,782
Year 2	5,653,616	7,563,807
Year 3	6,135,011	9,549,557
Year 4	8,045,731	5,603,650
Year 5	4,806,776	3,663,285
Prior	8,966,065	7,419,863
Revolving Loans	13,355,432	12,520,741
Revolving Loans Converted to Term Loans	196,143	193,952
Total	56,878,172	53,726,637
Gross write-offs Total	71,452	146,257	$ 54,372
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	9,671,422	7,127,517
Year 2	5,570,406	7,422,477
Year 3	5,975,946	9,316,206
Year 4	7,772,190	5,414,088
Year 5	4,649,165	3,567,683
Prior	8,718,176	7,175,711
Revolving Loans	13,189,841	12,356,727
Revolving Loans Converted to Term Loans	189,877	173,075
Total	55,737,023	52,553,484
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	35,883	74,566
Year 2	68,676	99,381
Year 3	124,210	197,313
Year 4	238,322	176,822
Year 5	132,904	87,799
Prior	209,377	209,605
Revolving Loans	165,410	154,085
Revolving Loans Converted to Term Loans	1,654	15,365
Total	976,436	1,014,936
Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	12,093	9,699
Year 2	14,534	41,949
Year 3	34,855	36,038
Year 4	35,219	12,740
Year 5	24,707	7,803
Prior	38,512	34,547
Revolving Loans	181	9,929
Revolving Loans Converted to Term Loans	4,612	5,512
Total	164,713	158,217
Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	11,549	29
Gross write-offs year 2	1,213	50,973
Gross write-offs year 3	28,752	17,137
Gross write-offs year 4	4,803	11,119
Gross write-offs year 5	1,082	1,568
Gross write-offs year Prior	18,304	3,025
Gross write-offs year Revolving Loans	24	27,989
Gross write-offs Revolving Loans Converted to Term Loans	6	5
Gross write-offs Total	65,733	111,845
Consumer Lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,911,452	2,394,531
Year 2	1,847,167	2,782,386
Year 3	2,363,541	3,108,350
Year 4	2,831,381	2,090,575
Year 5	1,874,846	1,419,106
Prior	3,287,067	2,480,697
Revolving Loans	1,773,347	1,673,296
Revolving Loans Converted to Term Loans	76,843	105,594
Total	16,965,644	16,054,535
Loan converted to term loan	2,000	22,000	44,000
Consumer Lending | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	9
Gross write-offs year 2	14	3,010
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	0
Gross write-offs year Revolving Loans	0	890
Gross write-offs Revolving Loans Converted to Term Loans	6	5
Gross write-offs Total	20	3,914
Consumer Lending | Single-Family Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,869,487	2,367,565
Year 2	1,842,358	2,776,003
Year 3	2,358,276	3,077,347
Year 4	2,818,738	2,087,168
Year 5	1,861,965	1,410,983
Prior	3,251,725	2,456,380
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	15,002,549	14,175,446
Gross write-offs Total	57	35	0
Consumer Lending | Single-Family Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,861,764	2,360,674
Year 2	1,837,821	2,762,921
Year 3	2,349,242	3,074,668
Year 4	2,808,694	2,079,323
Year 5	1,860,110	1,407,031
Prior	3,228,996	2,437,446
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	14,946,627	14,122,063
Consumer Lending | Single-Family Residential | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,157	4,175
Year 2	3,646	3,409
Year 3	5,589	750
Year 4	5,427	5,810
Year 5	235	1,548
Prior	9,356	6,069
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	27,410	21,761
Consumer Lending | Single-Family Residential | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	4,566	2,716
Year 2	891	9,673
Year 3	3,445	1,929
Year 4	4,617	2,035
Year 5	1,620	2,404
Prior	13,373	12,865
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	28,512	31,622
Consumer Lending | Single-Family Residential | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	9
Gross write-offs year 2	14	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	0
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	14	9
Consumer Lending | HELOCs
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	16,819	12,050
Year 2	4,809	6,383
Year 3	5,216	8,011
Year 4	8,008	3,275
Year 5	12,752	8,123
Prior	29,772	17,517
Revolving Loans	1,757,678	1,650,675
Revolving Loans Converted to Term Loans	76,843	105,594
Total	1,911,897	1,811,628
Gross write-offs Total	6	15	138
Consumer Lending | HELOCs | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	13,652	7,453
Year 2	4,796	3,288
Year 3	4,740	4,071
Year 4	5,258	3,236
Year 5	11,233	7,570
Prior	22,213	8,152
Revolving Loans	1,750,894	1,648,337
Revolving Loans Converted to Term Loans	70,577	99,488
Total	1,883,363	1,781,595
Consumer Lending | HELOCs | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,879	1,436
Year 2	0	0
Year 3	97	1,420
Year 4	140	0
Year 5	287	135
Prior	526	2,064
Revolving Loans	6,784	2,338
Revolving Loans Converted to Term Loans	1,654	594
Total	11,367	7,987
Consumer Lending | HELOCs | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	1,288	3,161
Year 2	13	3,095
Year 3	379	2,520
Year 4	2,610	39
Year 5	1,232	418
Prior	7,033	7,301
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	4,612	5,512
Total	17,167	22,046
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	0	10
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	0
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	6	5
Gross write-offs Total	6	15
Consumer Lending | Total residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,886,306	2,379,615
Year 2	1,847,167	2,782,386
Year 3	2,363,492	3,085,358
Year 4	2,826,746	2,090,443
Year 5	1,874,717	1,419,106
Prior	3,281,497	2,473,897
Revolving Loans	1,757,678	1,650,675
Revolving Loans Converted to Term Loans	76,843	105,594
Total	16,914,446	15,987,074
Consumer Lending | Total residential mortgage | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	0	9
Gross write-offs year 2	14	10
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	0
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	6	5
Gross write-offs Total	20	24
Consumer Lending | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	25,146	14,916
Year 2	0	0
Year 3	49	22,992
Year 4	4,635	132
Year 5	129	0
Prior	5,570	6,800
Revolving Loans	15,669	22,621
Revolving Loans Converted to Term Loans	0	0
Total	51,198	67,461
Gross write-offs Total	152	4,259	197
Consumer Lending | Other consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	25,146	14,916
Year 2	0	0
Year 3	0	22,992
Year 4	4,635	132
Year 5	129	0
Prior	5,570	6,800
Revolving Loans	15,576	22,555
Revolving Loans Converted to Term Loans	0	0
Total	51,056	67,395
Consumer Lending | Other consumer | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	49	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Revolving Loans	93	66
Revolving Loans Converted to Term Loans	0	0
Total	142	66
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
Commercial Lending
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	6,807,946	4,817,251
Year 2	3,806,449	4,781,421
Year 3	3,771,470	6,441,207
Year 4	5,214,350	3,513,075
Year 5	2,931,930	2,244,179
Prior	5,678,998	4,939,166
Revolving Loans	11,582,085	10,847,445
Revolving Loans Converted to Term Loans	119,300	88,358
Total	39,912,528	37,672,102
Loan converted to term loan	53,000	7,000	29,000
Commercial Lending | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	11,549	20
Gross write-offs year 2	1,199	47,963
Gross write-offs year 3	28,752	17,137
Gross write-offs year 4	4,803	11,119
Gross write-offs year 5	1,082	1,568
Gross write-offs year Prior	18,304	3,025
Gross write-offs year Revolving Loans	24	27,099
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	65,713	107,931
Commercial Lending | C&I
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,016,862	2,644,162
Year 2	1,757,317	1,589,544
Year 3	908,739	1,080,900
Year 4	631,663	730,036
Year 5	484,751	257,291
Prior	316,190	336,179
Revolving Loans	11,467,265	10,736,014
Revolving Loans Converted to Term Loans	67,968	23,032
Total	18,650,755	17,397,158
Gross write-offs Total	44,996	125,413	36,573
Commercial Lending | C&I | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,013,368	2,605,928
Year 2	1,717,361	1,508,948
Year 3	880,267	999,586
Year 4	536,461	612,015
Year 5	391,413	243,528
Prior	302,893	295,884
Revolving Loans	11,308,551	10,574,404
Revolving Loans Converted to Term Loans	67,968	23,032
Total	18,218,282	16,863,325
Commercial Lending | C&I | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	572	34,412
Year 2	35,223	51,415
Year 3	1,662	61,041
Year 4	93,562	107,355
Year 5	83,813	10,538
Prior	6,771	31,160
Revolving Loans	158,626	151,747
Revolving Loans Converted to Term Loans	0	0
Total	380,229	447,668
Commercial Lending | C&I | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,922	3,822
Year 2	4,733	29,181
Year 3	26,810	20,273
Year 4	1,640	10,666
Year 5	9,525	3,225
Prior	6,526	9,135
Revolving Loans	88	9,863
Revolving Loans Converted to Term Loans	0	0
Total	52,244	86,165
Commercial Lending | C&I | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	2,617	20
Gross write-offs year 2	1,199	47,963
Gross write-offs year 3	28,752	14,848
Gross write-offs year 4	4,643	11,119
Gross write-offs year 5	1,063	1,568
Gross write-offs year Prior	3,170	3,012
Gross write-offs year Revolving Loans	24	27,099
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	41,468	105,629
Commercial Lending | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,649,381	1,695,420
Year 2	1,592,227	2,341,320
Year 3	2,136,467	3,782,603
Year 4	3,329,820	1,956,835
Year 5	1,769,826	1,373,773
Prior	3,803,143	3,344,525
Revolving Loans	78,712	96,791
Revolving Loans Converted to Term Loans	47,512	64,073
Total	15,407,088	14,655,340
Gross write-offs Total	24,237	14,236	7,048
Commercial Lending | CRE | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	2,615,789	1,660,877
Year 2	1,562,420	2,296,763
Year 3	2,015,433	3,692,498
Year 4	3,188,363	1,925,220
Year 5	1,708,927	1,296,439
Prior	3,607,918	3,176,450
Revolving Loans	78,712	96,791
Revolving Loans Converted to Term Loans	47,512	49,302
Total	14,825,074	14,194,340
Commercial Lending | CRE | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	30,275	34,543
Year 2	29,807	44,557
Year 3	116,862	90,105
Year 4	134,018	31,615
Year 5	48,569	75,578
Prior	183,937	167,401
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	14,771
Total	543,468	458,570
Commercial Lending | CRE | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	3,317	0
Year 2	0	0
Year 3	4,172	0
Year 4	7,439	0
Year 5	12,330	1,756
Prior	11,288	674
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	38,546	2,430
Commercial Lending | CRE | Gross write-offs
Financing Receivable, Credit Quality Indicator [Line Items]
Gross write-offs year 1	8,932	0
Gross write-offs year 2	0	0
Gross write-offs year 3	0	0
Gross write-offs year 4	160	0
Gross write-offs year 5	19	0
Gross write-offs year Prior	15,126	3
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	24,237	3
Commercial Lending | Multifamily Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	895,323	386,743
Year 2	338,209	521,754
Year 3	478,782	1,381,596
Year 4	1,143,868	784,272
Year 5	663,916	613,115
Prior	1,556,203	1,250,069
Revolving Loans	32,207	14,640
Revolving Loans Converted to Term Loans	3,820	1,253
Total	5,112,328	4,953,442
Gross write-offs Total	8	10	3
Commercial Lending | Multifamily Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	895,323	386,743
Year 2	338,209	521,754
Year 3	478,782	1,337,599
Year 4	1,138,693	752,230
Year 5	663,916	613,115
Prior	1,547,124	1,242,586
Revolving Loans	32,207	14,640
Revolving Loans Converted to Term Loans	3,820	1,253
Total	5,098,074	4,869,920
Commercial Lending | Multifamily Residential | Criticized (accrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	0	0
Year 3	0	43,997
Year 4	5,175	32,042
Year 5	0	0
Prior	8,787	2,911
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	13,962	78,950
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	292	4,572
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	292	4,572
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	8	10
Gross write-offs year Revolving Loans	0	0
Gross write-offs Revolving Loans Converted to Term Loans	0	0
Gross write-offs Total	8	10
Commercial Lending | Construction and land
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	246,380	90,926
Year 2	118,696	328,803
Year 3	247,482	196,108
Year 4	108,999	41,932
Year 5	13,437	0
Prior	3,462	8,393
Revolving Loans	3,901	0
Revolving Loans Converted to Term Loans	0	0
Total	742,357	666,162
Gross write-offs Total	1,996	2,289	$ 10,413
Commercial Lending | Construction and land | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	246,380	90,926
Year 2	109,799	328,803
Year 3	247,482	184,792
Year 4	90,086	41,932
Year 5	13,437	0
Prior	3,462	8,393
Revolving Loans	3,901	0
Revolving Loans Converted to Term Loans	0	0
Total	714,547	654,846
Commercial Lending | Construction and land | Criticized (nonaccrual)
Financing Receivable, Credit Quality Indicator [Line Items]
Year 1	0	0
Year 2	8,897	0
Year 3	0	11,316
Year 4	18,913	0
Year 5	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	27,810	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	3,791,084	2,173,089
Year 2	2,049,132	3,191,877
Year 3	2,862,731	5,360,307
Year 4	4,582,687	2,783,039
Year 5	2,447,179	1,986,888
Prior	5,362,808	4,602,987
Revolving Loans	114,820	111,431
Revolving Loans Converted to Term Loans	51,332	65,326
Total	21,261,773	20,274,944
Gross write-offs year 1	8,932
Gross write-offs year 2	0
Gross write-offs year 3	0
Gross write-offs year 4	160
Gross write-offs year 5	19
Gross write-offs year Prior	15,134
Gross write-offs year Revolving Loans	0
Gross write-offs Revolving Loans Converted to Term Loans	0
Gross write-offs Total	$ 24,245
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		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