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Loans Receivable and Allowance for Credit Losses (Aging Analysis on Loans Held-for-Investment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual $ 215,154  
Total loans 38,390,955 $ 34,778,539
Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 184,153  
Total loans 28,440,027 25,914,252
Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 133,939  
Total loans 13,631,726 12,150,931
Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 46,546  
Total loans 11,174,611 10,278,448
Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 3,668  
Total loans 3,033,998 2,856,374
Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 0  
Total loans 599,692 628,499
Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 50,214  
Total loans 14,808,301 13,763,321
Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 31,001  
Total loans 9,950,928 8,864,287
Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 16,814  
Total loans 8,185,953 7,108,590
Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 11,696  
Total loans 1,601,716 1,472,783
Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 28,510  
Total loans 9,787,669 8,581,373
Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 2,491  
Total loans 163,259 282,914
Current Accruing Loans    
Nonaccrual and Past Due Loans    
Current Accruing Loans 38,125,211  
Current Accruing Loans | Commercial Lending    
Nonaccrual and Past Due Loans    
Current Accruing Loans 28,224,064  
Current Accruing Loans | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Current Accruing Loans 13,488,070  
Current Accruing Loans | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Current Accruing Loans 11,127,690  
Current Accruing Loans | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Current Accruing Loans 3,028,512  
Current Accruing Loans | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Current Accruing Loans 579,792  
Current Accruing Loans | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Current Accruing Loans 14,735,994  
Current Accruing Loans | Consumer Lending    
Nonaccrual and Past Due Loans    
Current Accruing Loans 9,901,147  
Current Accruing Loans | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Current Accruing Loans 8,156,645  
Current Accruing Loans | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Current Accruing Loans 1,583,968  
Current Accruing Loans | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Current Accruing Loans 9,740,613  
Current Accruing Loans | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Current Accruing Loans 160,534  
Accruing Loans 30-59  Days Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, past due 44,136  
Accruing Loans 30-59  Days Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due 31,086  
Accruing Loans 30-59  Days Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, past due 8,993  
Accruing Loans 30-59  Days Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due 375  
Accruing Loans 30-59  Days Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, past due 1,818  
Accruing Loans 30-59  Days Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, past due 19,900  
Accruing Loans 30-59  Days Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due 22,093  
Accruing Loans 30-59  Days Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due 13,050  
Accruing Loans 30-59  Days Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, past due 9,911  
Accruing Loans 30-59  Days Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, past due 2,922  
Accruing Loans 30-59  Days Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, past due 12,833  
Accruing Loans 30-59  Days Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, past due 217  
Accruing Loans 60-89  Days Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, past due 6,454  
Accruing Loans 60-89  Days Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due 724  
Accruing Loans 60-89  Days Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, past due 724  
Accruing Loans 60-89  Days Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due 0  
Accruing Loans 60-89  Days Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, past due 0  
Accruing Loans 60-89  Days Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, past due 0  
Accruing Loans 60-89  Days Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due 0  
Accruing Loans 60-89  Days Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due 5,730  
Accruing Loans 60-89  Days Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, past due 2,583  
Accruing Loans 60-89  Days Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, past due 3,130  
Accruing Loans 60-89  Days Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, past due 5,713  
Accruing Loans 60-89  Days Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, past due 17  
Total Accruing Past Due Loans    
Nonaccrual and Past Due Loans    
Financing receivable, past due 50,590  
Total Accruing Past Due Loans | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due 31,810  
Total Accruing Past Due Loans | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, past due 9,717  
Total Accruing Past Due Loans | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due 375  
Total Accruing Past Due Loans | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, past due 1,818  
Total Accruing Past Due Loans | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, past due 19,900  
Total Accruing Past Due Loans | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due 22,093  
Total Accruing Past Due Loans | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due 18,780  
Total Accruing Past Due Loans | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, past due 12,494  
Total Accruing Past Due Loans | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, past due 6,052  
Total Accruing Past Due Loans | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, past due 18,546  
Total Accruing Past Due Loans | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, past due 234  
Nonaccrual Loans Less Than 90  Days Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 106,387  
Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 103,425  
Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 100,602  
Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 448  
Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 2,375  
Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 0  
Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 2,823  
Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 2,962  
Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 2,385  
Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 577  
Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 2,962  
Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 0  
Nonaccrual Loans 90 or More Days  Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 108,767  
Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 80,728  
Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 33,337  
Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 46,098  
Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 1,293  
Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 0  
Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 47,391  
Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 28,039  
Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 14,429  
Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 11,119  
Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual 25,548  
Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual $ 2,491  
Non-PCI loans    
Nonaccrual and Past Due Loans    
Financing receivable, past due   101,283
Financing receivable, nonaccrual   120,219
Total loans   34,555,668
Non-PCI loans | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due   73,691
Financing receivable, nonaccrual   92,095
Total loans   25,777,039
Non-PCI loans | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, past due   48,155
Financing receivable, nonaccrual   74,835
Total loans   12,149,121
Non-PCI loans | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due   24,807
Financing receivable, nonaccrual   16,441
Total loans   10,165,247
Non-PCI loans | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, past due   729
Financing receivable, nonaccrual   819
Total loans   2,834,212
Non-PCI loans | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, past due   0
Financing receivable, nonaccrual   0
Total loans   628,459
Non-PCI loans | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due   25,536
Financing receivable, nonaccrual   17,260
Total loans   13,627,918
Non-PCI loans | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due   27,592
Financing receivable, nonaccrual   28,124
Total loans   8,778,629
Non-PCI loans | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, past due   20,517
Financing receivable, nonaccrual   14,865
Total loans   7,028,979
Non-PCI loans | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, past due   7,064
Financing receivable, nonaccrual   10,742
Total loans   1,466,736
Non-PCI loans | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, past due   27,581
Financing receivable, nonaccrual   25,607
Total loans   8,495,715
Non-PCI loans | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, past due   11
Financing receivable, nonaccrual   2,517
Total loans   282,914
Non-PCI loans | Current Accruing Loans    
Nonaccrual and Past Due Loans    
Total loans   34,334,166
Non-PCI loans | Current Accruing Loans | Commercial Lending    
Nonaccrual and Past Due Loans    
Total loans   25,611,253
Non-PCI loans | Current Accruing Loans | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Total loans   12,026,131
Non-PCI loans | Current Accruing Loans | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Total loans   10,123,999
Non-PCI loans | Current Accruing Loans | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Total loans   2,832,664
Non-PCI loans | Current Accruing Loans | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Total loans   628,459
Non-PCI loans | Current Accruing Loans | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Total loans   13,585,122
Non-PCI loans | Current Accruing Loans | Consumer Lending    
Nonaccrual and Past Due Loans    
Total loans   8,722,913
Non-PCI loans | Current Accruing Loans | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Total loans   6,993,597
Non-PCI loans | Current Accruing Loans | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Total loans   1,448,930
Non-PCI loans | Current Accruing Loans | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Total loans   8,442,527
Non-PCI loans | Current Accruing Loans | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Total loans   280,386
Non-PCI loans | Accruing Loans 30-59  Days Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, past due   73,871
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due   54,149
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, past due   31,121
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due   22,830
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, past due   198
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, past due   0
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due   23,028
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due   19,722
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, past due   15,443
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, past due   4,273
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, past due   19,716
Non-PCI loans | Accruing Loans 30-59  Days Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, past due   6
Non-PCI loans | Accruing Loans 60-89  Days Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, past due   27,412
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due   19,542
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, past due   17,034
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due   1,977
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, past due   531
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, past due   0
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, past due   2,508
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, past due   7,870
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, past due   5,074
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, past due   2,791
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, past due   7,865
Non-PCI loans | Accruing Loans 60-89  Days Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, past due   5
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   35,570
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   32,158
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   31,084
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   540
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   534
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   0
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   1,074
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   3,412
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   1,964
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   1,448
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   3,412
Non-PCI loans | Nonaccrual Loans Less Than 90  Days Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   0
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   84,649
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   59,937
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | C&I    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   43,751
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   15,901
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | Residential loan | Multifamily    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   285
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | Construction and land    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   0
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Commercial Lending | Total CRE    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   16,186
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   24,712
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | Residential loan | Single-family    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   12,901
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | HELOCs    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   9,294
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | Total residential mortgage    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   22,195
Non-PCI loans | Nonaccrual Loans 90 or More Days  Past Due | Consumer Lending | Other consumer    
Nonaccrual and Past Due Loans    
Financing receivable, nonaccrual   $ 2,517