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Loans Receivable and Allowance for Credit Losses (Credit Risk Ratings for Non-PCI and PCI Loans by Loan Type) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | $ 34,778,539 | $ 32,385,189
Commercial Lending |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 25,914,252 | 24,326,631
Commercial Lending | C&I |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 12,150,931 | 12,056,970
Commercial Lending | CRE |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 10,278,448 | 9,260,199
Commercial Lending | Residential loan | Multifamily |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 2,856,374 | 2,470,668
Commercial Lending | Construction and land |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 628,499 | 538,794
Commercial Lending | Total CRE |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 13,763,321 | 12,269,661
Consumer Lending |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 8,864,287 | 8,058,558
Consumer Lending | Residential loan | Single-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 7,108,590 | 6,036,454
Consumer Lending | HELOCs |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 1,472,783 | 1,690,834
Consumer Lending | Total residential mortgage |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 8,581,373 | 7,727,288
Consumer Lending | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 282,914 | 331,270
Non-PCI loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 34,555,668 | 32,077,166
Non-PCI loans | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 33,582,886 | 31,413,557
Non-PCI loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 515,702 | 358,136
Non-PCI loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 440,105 | 295,058
Non-PCI loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 16,975 | 10,415
Non-PCI loans | Commercial Lending |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 25,777,039 | 24,124,659
Non-PCI loans | Commercial Lending | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 24,836,765 | 23,489,906
Non-PCI loans | Commercial Lending | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 510,632 | 350,183
Non-PCI loans | Commercial Lending | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 412,667 | 274,155
Non-PCI loans | Commercial Lending | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 16,975 | 10,415
Non-PCI loans | Commercial Lending | C&I |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 12,149,121 | 12,054,818
Non-PCI loans | Commercial Lending | C&I | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 11,423,094 | 11,644,470
Non-PCI loans | Commercial Lending | C&I | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 406,543 | 260,089
Non-PCI loans | Commercial Lending | C&I | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 302,509 | 139,844
Non-PCI loans | Commercial Lending | C&I | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 16,975 | 10,415
Non-PCI loans | Commercial Lending | CRE |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 10,165,247 | 9,097,165
Non-PCI loans | Commercial Lending | CRE | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 10,003,749 | 8,957,228
Non-PCI loans | Commercial Lending | CRE | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 83,683 | 49,705
Non-PCI loans | Commercial Lending | CRE | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 77,815 | 90,232
Non-PCI loans | Commercial Lending | CRE | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Commercial Lending | Residential loan | Multifamily |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 2,834,212 | 2,433,924
Non-PCI loans | Commercial Lending | Residential loan | Multifamily | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 2,806,475 | 2,402,991
Non-PCI loans | Commercial Lending | Residential loan | Multifamily | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 20,406 | 20,551
Non-PCI loans | Commercial Lending | Residential loan | Multifamily | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 7,331 | 10,382
Non-PCI loans | Commercial Lending | Residential loan | Multifamily | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Commercial Lending | Construction and land |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 628,459 | 538,752
Non-PCI loans | Commercial Lending | Construction and land | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 603,447 | 485,217
Non-PCI loans | Commercial Lending | Construction and land | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 19,838
Non-PCI loans | Commercial Lending | Construction and land | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 25,012 | 33,697
Non-PCI loans | Commercial Lending | Construction and land | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Commercial Lending | Total CRE |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 13,627,918 | 12,069,841
Non-PCI loans | Commercial Lending | Total CRE | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 13,413,671 | 11,845,436
Non-PCI loans | Commercial Lending | Total CRE | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 104,089 | 90,094
Non-PCI loans | Commercial Lending | Total CRE | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 110,158 | 134,311
Non-PCI loans | Commercial Lending | Total CRE | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Consumer Lending |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 8,778,629 | 7,952,507
Non-PCI loans | Consumer Lending | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 8,746,121 | 7,923,651
Non-PCI loans | Consumer Lending | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 5,070 | 7,953
Non-PCI loans | Consumer Lending | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 27,438 | 20,903
Non-PCI loans | Consumer Lending | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Consumer Lending | Residential loan | Single-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 7,028,979 | 5,939,258
Non-PCI loans | Consumer Lending | Residential loan | Single-family | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 7,012,522 | 5,925,584
Non-PCI loans | Consumer Lending | Residential loan | Single-family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 2,278 | 6,376
Non-PCI loans | Consumer Lending | Residential loan | Single-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 14,179 | 7,298
Non-PCI loans | Consumer Lending | Residential loan | Single-family | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Consumer Lending | HELOCs |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 1,466,736 | 1,681,979
Non-PCI loans | Consumer Lending | HELOCs | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 1,453,207 | 1,669,300
Non-PCI loans | Consumer Lending | HELOCs | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 2,787 | 1,576
Non-PCI loans | Consumer Lending | HELOCs | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 10,742 | 11,103
Non-PCI loans | Consumer Lending | HELOCs | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Consumer Lending | Total residential mortgage |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 8,495,715 | 7,621,237
Non-PCI loans | Consumer Lending | Total residential mortgage | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 8,465,729 | 7,594,884
Non-PCI loans | Consumer Lending | Total residential mortgage | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 5,065 | 7,952
Non-PCI loans | Consumer Lending | Total residential mortgage | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 24,921 | 18,401
Non-PCI loans | Consumer Lending | Total residential mortgage | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
Non-PCI loans | Consumer Lending | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 282,914 | 331,270
Non-PCI loans | Consumer Lending | Other consumer | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 280,392 | 328,767
Non-PCI loans | Consumer Lending | Other consumer | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 5 | 1
Non-PCI loans | Consumer Lending | Other consumer | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 2,517 | 2,502
Non-PCI loans | Consumer Lending | Other consumer | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 222,871 | 308,023
PCI Loans | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 211,635 | 285,201
PCI Loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 1,277
PCI Loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 11,236 | 21,545
PCI Loans | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 137,213 | 201,972
PCI Loans | Commercial Lending | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 126,269 | 181,098
PCI Loans | Commercial Lending | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 10,944 | 20,874
PCI Loans | Commercial Lending | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | C&I |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 1,810 | 2,152
PCI Loans | Commercial Lending | C&I | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 1,810 | 1,996
PCI Loans | Commercial Lending | C&I | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | C&I | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 156
PCI Loans | Commercial Lending | C&I | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | CRE |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 113,201 | 163,034
PCI Loans | Commercial Lending | CRE | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 102,257 | 143,839
PCI Loans | Commercial Lending | CRE | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | CRE | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 10,944 | 19,195
PCI Loans | Commercial Lending | CRE | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Residential loan | Multifamily |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 22,162 | 36,744
PCI Loans | Commercial Lending | Residential loan | Multifamily | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 22,162 | 35,221
PCI Loans | Commercial Lending | Residential loan | Multifamily | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Residential loan | Multifamily | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 1,523
PCI Loans | Commercial Lending | Residential loan | Multifamily | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Construction and land |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 40 | 42
PCI Loans | Commercial Lending | Construction and land | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 40 | 42
PCI Loans | Commercial Lending | Construction and land | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Construction and land | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Construction and land | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Total CRE |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 135,403 | 199,820
PCI Loans | Commercial Lending | Total CRE | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 124,459 | 179,102
PCI Loans | Commercial Lending | Total CRE | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Commercial Lending | Total CRE | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 10,944 | 20,718
PCI Loans | Commercial Lending | Total CRE | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Consumer Lending |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 85,658 | 106,051
PCI Loans | Consumer Lending | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 85,366 | 104,103
PCI Loans | Consumer Lending | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 1,277
PCI Loans | Consumer Lending | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 292 | 671
PCI Loans | Consumer Lending | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Consumer Lending | Residential loan | Single-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 79,611 | 97,196
PCI Loans | Consumer Lending | Residential loan | Single-family | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 79,517 | 95,789
PCI Loans | Consumer Lending | Residential loan | Single-family | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 1,021
PCI Loans | Consumer Lending | Residential loan | Single-family | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 94 | 386
PCI Loans | Consumer Lending | Residential loan | Single-family | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Consumer Lending | HELOCs |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 6,047 | 8,855
PCI Loans | Consumer Lending | HELOCs | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 5,849 | 8,314
PCI Loans | Consumer Lending | HELOCs | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 256
PCI Loans | Consumer Lending | HELOCs | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 198 | 285
PCI Loans | Consumer Lending | HELOCs | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Consumer Lending | Total residential mortgage |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 85,658 | 106,051
PCI Loans | Consumer Lending | Total residential mortgage | Pass/Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 85,366 | 104,103
PCI Loans | Consumer Lending | Total residential mortgage | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 1,277
PCI Loans | Consumer Lending | Total residential mortgage | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 292 | 671
PCI Loans | Consumer Lending | Total residential mortgage | Doubtful |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | 0 | 0
PCI Loans | Consumer Lending | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held-for-investment | $ 0 | $ 0

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