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Loans Receivable and Allowance for Credit Losses - Credit Risk Ratings and/or Vintage Years for Loans Held-for-Investment by Portfolio Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | $ 12,464,897 | $ 10,680,884 |
One Year before Current Fiscal Year | 8,204,714 | 6,294,357 |
Two Years before Current Fiscal Year | 4,810,435 | 5,104,045 |
Three Years before Current Fiscal Year | 3,871,740 | 3,678,223 |
Four Years before Current Fiscal Year | 2,936,646 | 2,400,331 |
Prior | 4,261,980 | 3,686,038 |
Revolving Loans | 11,460,495 | 9,612,862 |
Revolving Loans Converted to Term Loans | 191,523 | 237,041 |
Total | 48,202,430 | 41,693,781 |
Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 12,365,799 | 10,487,630 |
One Year before Current Fiscal Year | 8,084,723 | 6,171,008 |
Two Years before Current Fiscal Year | 4,590,045 | 5,019,097 |
Three Years before Current Fiscal Year | 3,791,578 | 3,553,784 |
Four Years before Current Fiscal Year | 2,786,218 | 2,329,521 |
Prior | 4,158,181 | 3,569,404 |
Revolving Loans | 11,359,948 | 9,497,636 |
Revolving Loans Converted to Term Loans | 169,958 | 232,645 |
Total | 47,306,450 | 40,860,725 |
Pass [Member] | Federal Housing Administration Loan |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Nonaccrual loans guaranteed by the FHA | 818 | 1,600 |
Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 80,235 | 159,448 |
One Year before Current Fiscal Year | 96,150 | 120,557 |
Two Years before Current Fiscal Year | 208,970 | 82,632 |
Three Years before Current Fiscal Year | 76,486 | 119,845 |
Four Years before Current Fiscal Year | 142,072 | 48,919 |
Prior | 76,117 | 94,146 |
Revolving Loans | 99,447 | 115,174 |
Revolving Loans Converted to Term Loans | 17,795 | 708 |
Total | 797,272 | 741,429 |
Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 18,863 | 33,806 |
One Year before Current Fiscal Year | 23,841 | 2,792 |
Two Years before Current Fiscal Year | 11,420 | 2,316 |
Three Years before Current Fiscal Year | 3,676 | 4,594 |
Four Years before Current Fiscal Year | 8,356 | 21,891 |
Prior | 27,682 | 22,488 |
Revolving Loans | 1,100 | 52 |
Revolving Loans Converted to Term Loans | 3,770 | 3,688 |
Total | 98,708 | 91,627 |
HELOCs |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Amount converted to loans | 0 | 54,100 | $ 145,000
Commercial Lending |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 8,898,251 | 8,046,445 |
One Year before Current Fiscal Year | 5,745,996 | 4,177,452 |
Two Years before Current Fiscal Year | 3,020,575 | 3,721,211 |
Three Years before Current Fiscal Year | 2,761,676 | 2,590,956 |
Four Years before Current Fiscal Year | 2,111,867 | 1,622,234 |
Prior | 2,719,920 | 2,486,373 |
Revolving Loans | 9,462,895 | 7,647,844 |
Revolving Loans Converted to Term Loans | 59,273 | 35,231 |
Total | 34,780,453 | 30,327,746 |
Amount converted to loans | 26,200 | 6,500 | $ 23,900
Commercial Lending | C&I |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 2,922,766 | 4,026,214 |
One Year before Current Fiscal Year | 2,092,308 | 1,253,234 |
Two Years before Current Fiscal Year | 682,520 | 701,797 |
Three Years before Current Fiscal Year | 426,477 | 239,265 |
Four Years before Current Fiscal Year | 170,234 | 156,829 |
Prior | 120,853 | 245,775 |
Revolving Loans | 9,275,389 | 7,498,652 |
Revolving Loans Converted to Term Loans | 20,548 | 28,842 |
Total | 15,711,095 | 14,150,608 |
Commercial Lending | C&I | Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 2,831,834 | 3,911,722 |
One Year before Current Fiscal Year | 2,053,215 | 1,133,085 |
Two Years before Current Fiscal Year | 623,026 | 629,007 |
Three Years before Current Fiscal Year | 392,013 | 187,195 |
Four Years before Current Fiscal Year | 143,970 | 132,392 |
Prior | 97,605 | 225,326 |
Revolving Loans | 9,177,401 | 7,383,485 |
Revolving Loans Converted to Term Loans | 20,548 | 28,842 |
Total | 15,339,612 | 13,631,054 |
Commercial Lending | C&I | Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 72,210 | 85,036 |
One Year before Current Fiscal Year | 34,296 | 117,357 |
Two Years before Current Fiscal Year | 48,761 | 72,277 |
Three Years before Current Fiscal Year | 34,221 | 51,553 |
Four Years before Current Fiscal Year | 20,646 | 15,136 |
Prior | 12,933 | 4,005 |
Revolving Loans | 97,988 | 115,167 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 321,055 | 460,531 |
Commercial Lending | C&I | Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 18,722 | 29,456 |
One Year before Current Fiscal Year | 4,797 | 2,792 |
Two Years before Current Fiscal Year | 10,733 | 513 |
Three Years before Current Fiscal Year | 243 | 517 |
Four Years before Current Fiscal Year | 5,618 | 9,301 |
Prior | 10,315 | 16,444 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 50,428 | 59,023 |
Commercial Lending | CRE |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 4,182,298 | 2,867,598 |
One Year before Current Fiscal Year | 2,484,251 | 2,093,703 |
Two Years before Current Fiscal Year | 1,664,574 | 2,239,696 |
Three Years before Current Fiscal Year | 1,811,774 | 1,884,558 |
Four Years before Current Fiscal Year | 1,562,842 | 1,150,285 |
Prior | 1,946,298 | 1,784,150 |
Revolving Loans | 167,108 | 128,668 |
Revolving Loans Converted to Term Loans | 38,725 | 6,389 |
Total | 13,857,870 | 12,155,047 |
Commercial Lending | CRE | Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 4,178,780 | 2,792,193 |
One Year before Current Fiscal Year | 2,404,634 | 2,090,503 |
Two Years before Current Fiscal Year | 1,505,150 | 2,230,520 |
Three Years before Current Fiscal Year | 1,771,679 | 1,863,481 |
Four Years before Current Fiscal Year | 1,471,710 | 1,120,682 |
Prior | 1,909,925 | 1,727,862 |
Revolving Loans | 165,653 | 128,668 |
Revolving Loans Converted to Term Loans | 22,009 | 6,389 |
Total | 13,429,540 | 11,960,298 |
Commercial Lending | CRE | Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 3,518 | 71,055 |
One Year before Current Fiscal Year | 60,573 | 3,200 |
Two Years before Current Fiscal Year | 159,424 | 9,176 |
Three Years before Current Fiscal Year | 40,095 | 21,077 |
Four Years before Current Fiscal Year | 91,132 | 24,851 |
Prior | 32,173 | 55,892 |
Revolving Loans | 1,455 | 0 |
Revolving Loans Converted to Term Loans | 16,716 | 0 |
Total | 405,086 | 185,251 |
Commercial Lending | CRE | Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 4,350 |
One Year before Current Fiscal Year | 19,044 | 0 |
Two Years before Current Fiscal Year | 0 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 4,752 |
Prior | 4,200 | 396 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 23,244 | 9,498 |
Commercial Lending | Real estate loan | Multifamily |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 1,500,289 | 1,026,295 |
One Year before Current Fiscal Year | 892,598 | 726,772 |
Two Years before Current Fiscal Year | 641,677 | 689,174 |
Three Years before Current Fiscal Year | 520,321 | 441,663 |
Four Years before Current Fiscal Year | 354,320 | 315,120 |
Prior | 652,538 | 456,057 |
Revolving Loans | 11,325 | 20,524 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 4,573,068 | 3,675,605 |
Commercial Lending | Real estate loan | Multifamily | Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 1,500,289 | 1,026,295 |
One Year before Current Fiscal Year | 892,598 | 726,772 |
Two Years before Current Fiscal Year | 641,677 | 688,453 |
Three Years before Current Fiscal Year | 519,614 | 419,319 |
Four Years before Current Fiscal Year | 350,044 | 308,087 |
Prior | 625,293 | 424,947 |
Revolving Loans | 11,325 | 20,524 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 4,540,840 | 3,614,397 |
Commercial Lending | Real estate loan | Multifamily | Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 0 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 0 | 721 |
Three Years before Current Fiscal Year | 707 | 22,344 |
Four Years before Current Fiscal Year | 4,276 | 7,033 |
Prior | 27,076 | 30,666 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 32,059 | 60,764 |
Commercial Lending | Real estate loan | Multifamily | Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 0 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 0 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 0 |
Prior | 169 | 444 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 169 | 444 |
Commercial Lending | Construction and land |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 292,898 | 126,338 |
One Year before Current Fiscal Year | 276,839 | 103,743 |
Two Years before Current Fiscal Year | 31,804 | 90,544 |
Three Years before Current Fiscal Year | 3,104 | 25,470 |
Four Years before Current Fiscal Year | 24,471 | 0 |
Prior | 231 | 391 |
Revolving Loans | 9,073 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 638,420 | 346,486 |
Commercial Lending | Construction and land | Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 288,394 | 122,983 |
One Year before Current Fiscal Year | 276,839 | 103,743 |
Two Years before Current Fiscal Year | 31,804 | 90,544 |
Three Years before Current Fiscal Year | 3,104 | 3,412 |
Four Years before Current Fiscal Year | 2,805 | 0 |
Prior | 231 | 391 |
Revolving Loans | 9,073 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 612,250 | 321,073 |
Commercial Lending | Construction and land | Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 4,504 | 3,355 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 0 | 0 |
Three Years before Current Fiscal Year | 0 | 22,058 |
Four Years before Current Fiscal Year | 21,666 | 0 |
Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 26,170 | 25,413 |
Commercial Lending | Construction and land | Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 0 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 0 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 0 |
Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 0 | 0 |
Commercial Lending | Total CRE |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 5,975,485 | 4,020,231 |
One Year before Current Fiscal Year | 3,653,688 | 2,924,218 |
Two Years before Current Fiscal Year | 2,338,055 | 3,019,414 |
Three Years before Current Fiscal Year | 2,335,199 | 2,351,691 |
Four Years before Current Fiscal Year | 1,941,633 | 1,465,405 |
Prior | 2,599,067 | 2,240,598 |
Revolving Loans | 187,506 | 149,192 |
Revolving Loans Converted to Term Loans | 38,725 | 6,389 |
Total | 19,069,358 | 16,177,138 |
Consumer Lending |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 3,566,646 | 2,634,439 |
One Year before Current Fiscal Year | 2,458,718 | 2,116,905 |
Two Years before Current Fiscal Year | 1,789,860 | 1,382,834 |
Three Years before Current Fiscal Year | 1,110,064 | 1,087,267 |
Four Years before Current Fiscal Year | 824,779 | 778,097 |
Prior | 1,542,060 | 1,199,665 |
Revolving Loans | 1,997,600 | 1,965,018 |
Revolving Loans Converted to Term Loans | 132,250 | 201,810 |
Total | 13,421,977 | 11,366,035 |
Consumer Lending | Real estate loan | Single-family |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 3,549,035 | 2,616,958 |
One Year before Current Fiscal Year | 2,454,992 | 2,108,370 |
Two Years before Current Fiscal Year | 1,776,685 | 1,378,138 |
Three Years before Current Fiscal Year | 1,106,630 | 1,085,732 |
Four Years before Current Fiscal Year | 823,237 | 769,545 |
Prior | 1,512,448 | 1,134,959 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 11,223,027 | 9,093,702 |
Consumer Lending | Real estate loan | Single-family | Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 3,548,894 | 2,616,958 |
One Year before Current Fiscal Year | 2,453,717 | 2,108,370 |
Two Years before Current Fiscal Year | 1,775,696 | 1,375,929 |
Three Years before Current Fiscal Year | 1,101,965 | 1,079,030 |
Four Years before Current Fiscal Year | 817,164 | 763,351 |
Prior | 1,500,359 | 1,127,516 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 11,197,795 | 9,071,154 |
Consumer Lending | Real estate loan | Single-family | Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 0 |
One Year before Current Fiscal Year | 1,275 | 0 |
Two Years before Current Fiscal Year | 785 | 458 |
Three Years before Current Fiscal Year | 1,463 | 2,813 |
Four Years before Current Fiscal Year | 4,352 | 1,899 |
Prior | 3,935 | 3,212 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 11,810 | 8,382 |
Consumer Lending | Real estate loan | Single-family | Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 141 | 0 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 204 | 1,751 |
Three Years before Current Fiscal Year | 3,202 | 3,889 |
Four Years before Current Fiscal Year | 1,721 | 4,295 |
Prior | 8,154 | 4,231 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 13,422 | 14,166 |
Consumer Lending | HELOCs |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 520 | 648 |
One Year before Current Fiscal Year | 3,589 | 3,277 |
Two Years before Current Fiscal Year | 7,819 | 4,696 |
Three Years before Current Fiscal Year | 3,434 | 1,535 |
Four Years before Current Fiscal Year | 1,542 | 6,811 |
Prior | 13,804 | 12,559 |
Revolving Loans | 1,959,697 | 1,913,485 |
Revolving Loans Converted to Term Loans | 132,250 | 201,810 |
Total | 2,122,655 | 2,144,821 |
Consumer Lending | HELOCs | Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 520 | 648 |
One Year before Current Fiscal Year | 3,583 | 3,277 |
Two Years before Current Fiscal Year | 7,336 | 4,644 |
Three Years before Current Fiscal Year | 3,203 | 1,347 |
Four Years before Current Fiscal Year | 525 | 3,268 |
Prior | 8,960 | 11,215 |
Revolving Loans | 1,958,692 | 1,913,478 |
Revolving Loans Converted to Term Loans | 127,401 | 197,414 |
Total | 2,110,220 | 2,135,291 |
Consumer Lending | HELOCs | Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 0 |
One Year before Current Fiscal Year | 6 | 0 |
Two Years before Current Fiscal Year | 0 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 0 |
Prior | 0 | 371 |
Revolving Loans | 4 | 7 |
Revolving Loans Converted to Term Loans | 1,079 | 708 |
Total | 1,089 | 1,086 |
Consumer Lending | HELOCs | Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 0 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 483 | 52 |
Three Years before Current Fiscal Year | 231 | 188 |
Four Years before Current Fiscal Year | 1,017 | 3,543 |
Prior | 4,844 | 973 |
Revolving Loans | 1,001 | 0 |
Revolving Loans Converted to Term Loans | 3,770 | 3,688 |
Total | 11,346 | 8,444 |
Consumer Lending | Total residential mortgage |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 3,549,555 | 2,617,606 |
One Year before Current Fiscal Year | 2,458,581 | 2,111,647 |
Two Years before Current Fiscal Year | 1,784,504 | 1,382,834 |
Three Years before Current Fiscal Year | 1,110,064 | 1,087,267 |
Four Years before Current Fiscal Year | 824,779 | 776,356 |
Prior | 1,526,252 | 1,147,518 |
Revolving Loans | 1,959,697 | 1,913,485 |
Revolving Loans Converted to Term Loans | 132,250 | 201,810 |
Total | 13,345,682 | 11,238,523 |
Consumer Lending | Other consumer |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 17,091 | 16,833 |
One Year before Current Fiscal Year | 137 | 5,258 |
Two Years before Current Fiscal Year | 5,356 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 1,741 |
Prior | 15,808 | 52,147 |
Revolving Loans | 37,903 | 51,533 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 76,295 | 127,512 |
Consumer Lending | Other consumer | Pass [Member] |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 17,088 | 16,831 |
One Year before Current Fiscal Year | 137 | 5,258 |
Two Years before Current Fiscal Year | 5,356 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 1,741 |
Prior | 15,808 | 52,147 |
Revolving Loans | 37,804 | 51,481 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 76,193 | 127,458 |
Consumer Lending | Other consumer | Criticized (accrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 3 | 2 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 0 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 0 |
Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | 3 | 2 |
Consumer Lending | Other consumer | Criticized (nonaccrual) |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Current Fiscal Year | 0 | 0 |
One Year before Current Fiscal Year | 0 | 0 |
Two Years before Current Fiscal Year | 0 | 0 |
Three Years before Current Fiscal Year | 0 | 0 |
Four Years before Current Fiscal Year | 0 | 0 |
Prior | 0 | 0 |
Revolving Loans | 99 | 52 |
Revolving Loans Converted to Term Loans | 0 | 0 |
Total | $ 99 | $ 52 |

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