v3.26.1
Loans - Loans Held-for-Investment and Current Period Gross Charge-Offs, Excluding PCD Loans, Net of Deferred Fees and Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]      
Total $ 3,807,957   $ 3,856,773
Current-period gross charge-offs      
Total 1,499 $ 3,098  
Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 29,434   262,501
Year Two 262,939   111,504
Year Three 108,119   224,171
Year Four 221,912   824,692
Year Five 817,336   770,866
Prior 2,164,456   1,464,200
Revolving Loans 195,517   190,576
Total 3,799,713   3,848,510
Current-period gross charge-offs      
Current Fiscal Year 0   0
Year Two 0   67
Year Three 75   855
Year Four 0   2,371
Year Five 940   1,112
Prior 484   935
Revolving Loans 0   0
Total 1,499 3,098 5,340
PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Total 8,244   8,263
Current-period gross charge-offs      
Current Fiscal Year     343
Total 0 0  
Real estate loans: | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 22,480   251,165
Year Two 253,512   96,438
Year Three 92,588   208,242
Year Four 206,438   808,455
Year Five 803,029   759,628
Prior 2,148,493   1,457,926
Revolving Loans 99,155   99,080
Total 3,625,695   3,680,934
Real estate loans: | Multifamily | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 7,160   102,597
Year Two 102,313   4,818
Year Three 4,801   84,164
Year Four 83,787   561,040
Year Five 557,845   601,535
Prior 1,557,903   1,006,927
Revolving Loans 240   284
Total 2,314,049   2,361,365
Real estate loans: | Multifamily | Pass | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 7,160   102,597
Year Two 102,313   4,818
Year Three 4,801   84,164
Year Four 83,787   561,040
Year Five 556,748   600,369
Prior 1,540,138   990,193
Revolving Loans 240   284
Total 2,295,187   2,343,465
Real estate loans: | Multifamily | Special mention | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 0   0
Year Four 0   0
Year Five 1,097   1,166
Prior 7,472   6,325
Revolving Loans 0   0
Total 8,569   7,491
Real estate loans: | Multifamily | Substandard | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 0   0
Year Four 0   0
Year Five 0   0
Prior 10,293   10,409
Revolving Loans 0   0
Total 10,293   10,409
Real estate loans: | Commercial mortgage | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 7,744   92,786
Year Two 92,709   61,761
Year Three 61,020   85,492
Year Four 84,965   189,608
Year Five 188,112   135,579
Prior 464,640   343,533
Revolving Loans 2,398   2,631
Total 901,588   911,390
Real estate loans: | Commercial mortgage | Pass | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 7,744   92,786
Year Two 92,709   61,761
Year Three 61,020   85,492
Year Four 84,965   183,083
Year Five 181,635   135,579
Prior 451,027   326,204
Revolving Loans 2,115   2,346
Total 881,215   887,251
Real estate loans: | Commercial mortgage | Special mention | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 0   0
Year Four 0   0
Year Five 0   0
Prior 3,692   8,064
Revolving Loans 0   0
Total 3,692   8,064
Real estate loans: | Commercial mortgage | Substandard | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 0   0
Year Four 0   6,525
Year Five 6,477   0
Prior 9,921   9,265
Revolving Loans 283   285
Total 16,681   16,075
Real estate loans: | One-to-four family residential mortgage | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 4,303   20,730
Year Two 19,772   16,026
Year Three 14,691   13,439
Year Four 12,863   20,964
Year Five 20,339   11,407
Prior 91,334   81,894
Revolving Loans 897   640
Total 164,199   165,100
Current-period gross charge-offs      
Total 0 0  
Real estate loans: | One-to-four family residential mortgage | Pass | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 4,303   20,730
Year Two 19,772   16,026
Year Three 14,691   13,439
Year Four 12,863   20,964
Year Five 20,339   11,407
Prior 90,019   80,563
Revolving Loans 897   640
Total 162,884   163,769
Real estate loans: | One-to-four family residential mortgage | Substandard | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 0   0
Year Four 0   0
Year Five 0   0
Prior 1,315   1,331
Revolving Loans 0   0
Total 1,315   1,331
Real estate loans: | Home equity and lines of credit | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 1,738   14,932
Year Two 13,921   12,458
Year Three 11,826   15,738
Year Four 15,443   28,792
Year Five 27,866   11,107
Prior 29,282   20,005
Revolving Loans 95,620   95,525
Total 195,696   198,557
Current-period gross charge-offs      
Current Fiscal Year 0    
Year Two 0    
Year Three 0    
Year Four 0    
Year Five 0    
Prior 5    
Revolving Loans 0    
Total 5 0  
Real estate loans: | Home equity and lines of credit | Pass | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 1,738   14,828
Year Two 13,818   12,458
Year Three 11,728   15,300
Year Four 14,901   27,309
Year Five 26,395   10,564
Prior 28,660   19,831
Revolving Loans 95,620   95,525
Total 192,860   195,815
Real estate loans: | Home equity and lines of credit | Special mention | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 98   0
Year Four 0   64
Year Five 63   0
Prior 0   0
Revolving Loans 0   0
Total 161   64
Real estate loans: | Home equity and lines of credit | Substandard | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   104
Year Two 103   0
Year Three 0   438
Year Four 542   1,419
Year Five 1,408   543
Prior 622   174
Revolving Loans 0   0
Total 2,675   2,678
Real estate loans: | Construction and land | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 1,535   20,120
Year Two 24,797   1,375
Year Three 250   9,409
Year Four 9,380   8,051
Year Five 8,867   0
Prior 5,334   5,567
Revolving Loans 0   0
Total 50,163   44,522
Current-period gross charge-offs      
Total 0 0  
Real estate loans: | Construction and land | Pass | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 1,535   20,120
Year Two 24,797   1,375
Year Three 250   9,409
Year Four 9,380   8,051
Year Five 8,867   0
Prior 5,334   5,567
Revolving Loans 0   0
Total 50,163   44,522
Commercial and industrial | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 5,963   9,971
Year Two 9,427   15,066
Year Three 15,531   15,929
Year Four 15,474   16,237
Year Five 14,307   11,238
Prior 15,947   6,256
Revolving Loans 96,339   91,470
Total 172,988   166,167
Current-period gross charge-offs      
Current Fiscal Year 0   0
Year Two 0   67
Year Three 75   855
Year Four 0   2,371
Year Five 940   1,112
Prior 479   935
Revolving Loans 0   0
Total 1,494 3,098 5,340
Commercial and industrial | Pass | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 5,963   9,971
Year Two 9,427   12,546
Year Three 12,648   12,222
Year Four 11,822   15,355
Year Five 13,565   9,791
Prior 14,332   5,887
Revolving Loans 92,775   87,829
Total 160,532   153,601
Commercial and industrial | Special mention | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 376   555
Year Four 0   0
Year Five 402   0
Prior 0   0
Revolving Loans 2,382   2,384
Total 3,160   2,939
Commercial and industrial | Substandard | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   2,520
Year Three 2,507   3,152
Year Four 3,652   882
Year Five 340   1,447
Prior 1,615   369
Revolving Loans 1,182   1,257
Total 9,296   9,627
Other loans | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 991   1,365
Year Two 0   0
Year Three 0   0
Year Four 0   0
Year Five 0   0
Prior 16   18
Revolving Loans 23   26
Total 1,030   1,409
Current-period gross charge-offs      
Total 0 $ 0  
Other loans | Pass | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 991   1,365
Year Two 0   0
Year Three 0   0
Year Four 0   0
Year Five 0   0
Prior 14   15
Revolving Loans 23   26
Total 1,028   1,406
Other loans | Substandard | Loans held-for-investment excluding PCD loans      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Current Fiscal Year 0   0
Year Two 0   0
Year Three 0   0
Year Four 0   0
Year Five 0   0
Prior 2   3
Revolving Loans 0   0
Total $ 2   $ 3