Loans Receivable and Allowance for Credit Losses - Schedule Of Aging Analysis Of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current, Past Due or Nonaccrual Loans
Total	$ 52,767,909	$ 52,210,782
Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	52,505,421	51,984,909
Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	96,606	122,999
Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	68,756	88,791
Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	27,850	34,208
Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	165,882	102,874
Commercial lending
Current, Past Due or Nonaccrual Loans
Total	37,202,607	37,045,191
Commercial lending | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	37,052,670	36,927,223
Commercial lending | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	35,774	53,014
Commercial lending | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	25,369	44,117
Commercial lending | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	10,405	8,897
Commercial lending | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	114,163	64,954
Commercial lending | C&I
Current, Past Due or Nonaccrual Loans
Total	16,875,009	16,581,079
Commercial lending | C&I | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	16,785,688	16,508,394
Commercial lending | C&I | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	22,361	35,649
Commercial lending | C&I | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	12,851	28,550
Commercial lending | C&I | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	9,510	7,099
Commercial lending | C&I | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	66,960	37,036
Commercial lending | CRE
Current, Past Due or Nonaccrual Loans
Total	14,562,595	14,777,081
Commercial lending | CRE | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	14,518,793	14,750,315
Commercial lending | CRE | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	12,522	3,517
Commercial lending | CRE | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	11,627	1,719
Commercial lending | CRE | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	895	1,798
Commercial lending | CRE | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	31,280	23,249
Commercial lending | Construction and land
Current, Past Due or Nonaccrual Loans
Total	664,793	663,868
Commercial lending | Construction and land | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	653,477	650,617
Commercial lending | Construction and land | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	0	13,251
Commercial lending | Construction and land | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	0	13,251
Commercial lending | Construction and land | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	0	0
Commercial lending | Construction and land | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	11,316	0
Commercial lending | Total CRE
Current, Past Due or Nonaccrual Loans
Total	20,327,598	20,464,112
Commercial lending | Total CRE | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	20,266,982	20,418,829
Commercial lending | Total CRE | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	13,413	17,365
Commercial lending | Total CRE | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	12,518	15,567
Commercial lending | Total CRE | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	895	1,798
Commercial lending | Total CRE | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	47,203	27,918
Commercial lending | Multifamily residential
Current, Past Due or Nonaccrual Loans
Total	5,100,210	5,023,163
Commercial lending | Multifamily residential | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	5,094,712	5,017,897
Commercial lending | Multifamily residential | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	891	597
Commercial lending | Multifamily residential | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	891	597
Commercial lending | Multifamily residential | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	0	0
Commercial lending | Multifamily residential | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	4,607	4,669
Consumer lending
Current, Past Due or Nonaccrual Loans
Total	15,565,302	15,165,591
Consumer lending | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	15,452,751	15,057,686
Consumer lending | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	60,832	69,985
Consumer lending | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	43,387	44,674
Consumer lending | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	17,445	25,311
Consumer lending | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	51,719	37,920
Consumer lending | HELOCs
Current, Past Due or Nonaccrual Loans
Total	1,761,379	1,722,204
Consumer lending | HELOCs | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	1,729,694	1,687,301
Consumer lending | HELOCs | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	18,455	21,492
Consumer lending | HELOCs | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	13,236	12,266
Consumer lending | HELOCs | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	5,219	9,226
Consumer lending | HELOCs | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	13,230	13,411
Consumer lending | Total residential mortgage
Current, Past Due or Nonaccrual Loans
Total	15,509,148	15,105,264
Consumer lending | Total residential mortgage | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	15,397,045	15,000,756
Consumer lending | Total residential mortgage | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	60,589	66,720
Consumer lending | Total residential mortgage | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	43,229	41,551
Consumer lending | Total residential mortgage | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	17,360	25,169
Consumer lending | Total residential mortgage | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	51,514	37,788
Consumer lending | Other consumer
Current, Past Due or Nonaccrual Loans
Total	56,154	60,327
Consumer lending | Other consumer | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	55,706	56,930
Consumer lending | Other consumer | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	243	3,265
Consumer lending | Other consumer | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	158	3,123
Consumer lending | Other consumer | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	85	142
Consumer lending | Other consumer | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	205	132
Consumer lending | Single-family residential
Current, Past Due or Nonaccrual Loans
Total	13,747,769	13,383,060
Consumer lending | Single-family residential | Current Accruing Loans
Current, Past Due or Nonaccrual Loans
Total	13,667,351	13,313,455
Consumer lending | Single-family residential | Total Accruing Past Due Loans
Current, Past Due or Nonaccrual Loans
Total	42,134	45,228
Consumer lending | Single-family residential | Accruing Loans 30-59 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	29,993	29,285
Consumer lending | Single-family residential | Accruing Loans 60-89 Days Past Due
Current, Past Due or Nonaccrual Loans
Total	12,141	15,943
Consumer lending | Single-family residential | Nonperforming Financial Instruments
Current, Past Due or Nonaccrual Loans
Total	$ 38,284	$ 24,377