v3.26.1
LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Credit Ratings (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year $ 1,255,366   $ 4,176,858
Fiscal year before current year 3,719,094   2,193,302
Two years before current year 2,061,688   953,901
Three years before current year 807,933   2,994,825
Four years before current year 2,846,314   944,191
Prior 2,141,152   1,356,377
Revolving loans amortized cost basis 2,451,299   2,239,108
Revolving loans converted to term 232,468   178,110
Loans and leases receivable 15,515,314   15,036,672
Current year, charge-offs 622   2,621
Fiscal year before current year, charge-offs 5,138   5,777
Two years before current fiscal year, charge-offs 1,338   13,739
Three years before current fiscal year, charge-offs 2,530   26,710
Four years before current fiscal year, charge-offs 3,017   7,418
Prior, charge-offs 4,427   16,031
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 17,072 $ 20,763 72,296
Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 14,212,864   13,738,416
Consumer      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 1,306,629   1,302,924
Commercial loans and leases receivable | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 1,146,673   3,881,276
Fiscal year before current year 3,442,582   2,083,792
Two years before current year 1,963,515   754,420
Three years before current year 630,904   2,679,569
Four years before current year 2,562,846   787,902
Prior 1,862,449   1,215,614
Revolving loans amortized cost basis 2,367,248   2,153,066
Revolving loans converted to term 232,468   178,109
Loans and leases receivable 14,208,685   13,733,748
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 3,616   1,064
Two years before current fiscal year, charge-offs 0   896
Three years before current fiscal year, charge-offs 0   11,297
Four years before current fiscal year, charge-offs 112   961
Prior, charge-offs 3,411   13,219
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 7,139   27,437
Commercial and industrial, including specialized lending      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 8,470,499   8,206,506
Loans and leases receivable, charge-offs 4,479 4,507  
Commercial and industrial, including specialized lending | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 858,546   2,617,091
Fiscal year before current year 2,110,709   1,295,197
Two years before current year 1,171,961   610,860
Three years before current year 484,684   896,087
Four years before current year 835,344   252,612
Prior 419,524   214,420
Revolving loans amortized cost basis 2,359,294   2,142,162
Revolving loans converted to term 230,437   178,077
Loans and leases receivable 8,470,499   8,206,506
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 3,616   1,064
Two years before current fiscal year, charge-offs 0   881
Three years before current fiscal year, charge-offs 0   10,880
Four years before current fiscal year, charge-offs 82   600
Prior, charge-offs 781   1,307
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 4,479   14,732
Commercial and industrial, including specialized lending | Pass | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 858,546   2,609,580
Fiscal year before current year 2,094,727   1,280,152
Two years before current year 1,153,593   609,744
Three years before current year 482,935   839,184
Four years before current year 787,170   233,753
Prior 320,169   129,958
Revolving loans amortized cost basis 2,349,720   2,131,707
Revolving loans converted to term 219,819   167,916
Loans and leases receivable 8,266,679   8,001,994
Commercial and industrial, including specialized lending | Special mention | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   7,511
Fiscal year before current year 15,831   4,778
Two years before current year 4,444   0
Three years before current year 0   37,976
Four years before current year 17,956   3,633
Prior 2,526   0
Revolving loans amortized cost basis 9,077   9,658
Revolving loans converted to term 7,766   7,150
Loans and leases receivable 57,600   70,706
Commercial and industrial, including specialized lending | Substandard | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 151   10,267
Two years before current year 13,924   1,116
Three years before current year 1,749   18,927
Four years before current year 30,218   15,226
Prior 96,829   84,462
Revolving loans amortized cost basis 497   797
Revolving loans converted to term 2,852   3,011
Loans and leases receivable 146,220   133,806
Commercial and industrial, including specialized lending | Doubtful | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 0   0
Multifamily      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 2,510,697   2,490,336
Loans and leases receivable, charge-offs 2,630 3,834  
Multifamily | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 84,962   467,366
Fiscal year before current year 455,473   233,998
Two years before current year 233,082   775
Three years before current year 764   1,170,419
Four years before current year 1,159,955   280,310
Prior 576,461   337,468
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 2,510,697   2,490,336
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 0   0
Two years before current fiscal year, charge-offs 0   0
Three years before current fiscal year, charge-offs 0   0
Four years before current fiscal year, charge-offs 0   0
Prior, charge-offs 2,630   8,446
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 2,630   8,446
Multifamily | Pass | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 84,962   467,366
Fiscal year before current year 455,473   233,998
Two years before current year 233,082   775
Three years before current year 764   1,148,681
Four years before current year 1,138,332   242,865
Prior 484,184   290,416
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 2,396,797   2,384,101
Multifamily | Special mention | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   14,556
Four years before current year 14,474   20,471
Prior 23,536   16,920
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 38,010   51,947
Multifamily | Substandard | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   7,182
Four years before current year 7,149   16,974
Prior 68,741   30,132
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 75,890   54,288
Multifamily | Doubtful | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 0   0
Commercial real estate owner occupied loans:      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 1,279,501   1,135,119
Loans and leases receivable, charge-offs 30 19  
Commercial real estate owner occupied loans: | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 101,158   235,678
Fiscal year before current year 295,591   335,437
Two years before current year 334,237   55,445
Three years before current year 53,734   206,797
Four years before current year 205,414   162,953
Prior 281,732   131,173
Revolving loans amortized cost basis 7,604   7,604
Revolving loans converted to term 31   32
Loans and leases receivable 1,279,501   1,135,119
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 0   0
Two years before current fiscal year, charge-offs 0   15
Three years before current fiscal year, charge-offs 0   417
Four years before current fiscal year, charge-offs 30   361
Prior, charge-offs 0   393
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 30   1,186
Commercial real estate owner occupied loans: | Pass | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 101,158   217,893
Fiscal year before current year 277,885   335,437
Two years before current year 334,237   52,517
Three years before current year 45,951   195,951
Four years before current year 192,272   161,739
Prior 270,532   124,346
Revolving loans amortized cost basis 7,604   7,604
Revolving loans converted to term 31   32
Loans and leases receivable 1,229,670   1,095,519
Commercial real estate owner occupied loans: | Special mention | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   17,785
Fiscal year before current year 17,706   0
Two years before current year 0   0
Three years before current year 2,920   10,676
Four years before current year 10,314   1,214
Prior 134   43
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 31,074   29,718
Commercial real estate owner occupied loans: | Substandard | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   2,928
Three years before current year 4,863   170
Four years before current year 2,828   0
Prior 11,066   6,784
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 18,757   9,882
Commercial real estate owner occupied loans: | Doubtful | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 0   0
Commercial real estate non-owner occupied      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 1,742,989   1,738,821
Loans and leases receivable, charge-offs 0 0  
Commercial real estate non-owner occupied | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 90,722   524,297
Fiscal year before current year 522,973   163,771
Two years before current year 163,429   38,184
Three years before current year 38,114   384,689
Four years before current year 340,669   92,027
Prior 584,732   532,553
Revolving loans amortized cost basis 350   3,300
Revolving loans converted to term 2,000   0
Loans and leases receivable 1,742,989   1,738,821
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 0   0
Two years before current fiscal year, charge-offs 0   0
Three years before current fiscal year, charge-offs 0   0
Four years before current fiscal year, charge-offs 0   0
Prior, charge-offs 0   3,073
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 0   3,073
Commercial real estate non-owner occupied | Pass | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 90,722   524,297
Fiscal year before current year 522,973   163,771
Two years before current year 163,429   14,136
Three years before current year 14,073   354,528
Four years before current year 333,976   86,017
Prior 578,275   525,878
Revolving loans amortized cost basis 350   3,300
Revolving loans converted to term 2,000   0
Loans and leases receivable 1,705,798   1,671,927
Commercial real estate non-owner occupied | Special mention | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   24,048
Three years before current year 24,041   28,407
Four years before current year 3,540   6,010
Prior 5,449   5,626
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 33,030   64,091
Commercial real estate non-owner occupied | Substandard | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   1,754
Four years before current year 3,153   0
Prior 1,008   1,049
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 4,161   2,803
Commercial real estate non-owner occupied | Doubtful | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 0   0
Construction loans:      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 204,999   162,966
Loans and leases receivable, charge-offs 0 0  
Construction loans: | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 11,285   36,844
Fiscal year before current year 57,836   55,389
Two years before current year 60,806   49,156
Three years before current year 53,608   21,577
Four years before current year 21,464   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 204,999   162,966
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 0   0
Two years before current fiscal year, charge-offs 0   0
Three years before current fiscal year, charge-offs 0   0
Four years before current fiscal year, charge-offs 0   0
Prior, charge-offs 0   0
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 0   0
Construction loans: | Pass | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 11,285   36,844
Fiscal year before current year 57,836   55,389
Two years before current year 60,806   49,156
Three years before current year 53,608   21,577
Four years before current year 21,464   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 204,999   162,966
Construction loans: | Special mention | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 0   0
Construction loans: | Substandard | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 0   0
Construction loans: | Doubtful | Commercial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 0   0
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 0   0
Consumer loans | Consumer      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 108,693   295,582
Fiscal year before current year 276,512   109,510
Two years before current year 98,173   199,481
Three years before current year 177,029   315,256
Four years before current year 283,468   156,289
Prior 278,703   140,763
Revolving loans amortized cost basis 84,051   86,042
Revolving loans converted to term 0   1
Loans and leases receivable 1,306,629   1,302,924
Current year, charge-offs 622   2,621
Fiscal year before current year, charge-offs 1,522   4,713
Two years before current fiscal year, charge-offs 1,338   12,843
Three years before current fiscal year, charge-offs 2,530   15,413
Four years before current fiscal year, charge-offs 2,905   6,457
Prior, charge-offs 1,016   2,812
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 9,933   44,859
Residential real estate      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 495,458   497,567
Loans and leases receivable, charge-offs 1 0  
Residential real estate | Consumer      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 3,581   49,521
Fiscal year before current year 49,360   32,480
Two years before current year 32,346   19,086
Three years before current year 18,996   153,996
Four years before current year 152,285   115,974
Prior 193,767   80,579
Revolving loans amortized cost basis 45,123   45,931
Revolving loans converted to term 0   0
Loans and leases receivable 495,458   497,567
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 0   0
Two years before current fiscal year, charge-offs 0   53
Three years before current fiscal year, charge-offs 0   0
Four years before current fiscal year, charge-offs 1   0
Prior, charge-offs 0   3
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 1   56
Residential real estate | Consumer | Performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 3,581   49,521
Fiscal year before current year 49,360   32,347
Two years before current year 32,216   18,124
Three years before current year 18,022   152,771
Four years before current year 151,794   114,934
Prior 188,287   75,589
Revolving loans amortized cost basis 44,956   44,794
Revolving loans converted to term 0   0
Loans and leases receivable 488,216   488,080
Residential real estate | Consumer | Non-performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   133
Two years before current year 130   962
Three years before current year 974   1,225
Four years before current year 491   1,040
Prior 5,480   4,990
Revolving loans amortized cost basis 167   1,137
Revolving loans converted to term 0   0
Loans and leases receivable 7,242   9,487
Manufactured housing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 26,065   27,452
Loans and leases receivable, charge-offs 0 0  
Manufactured housing | Consumer      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 26,065   27,452
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 26,065   27,452
Current year, charge-offs 0   0
Fiscal year before current year, charge-offs 0   0
Two years before current fiscal year, charge-offs 0   0
Three years before current fiscal year, charge-offs 0   0
Four years before current fiscal year, charge-offs 0   0
Prior, charge-offs 0   0
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 0   0
Manufactured housing | Consumer | Performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 24,499   25,845
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 24,499   25,845
Manufactured housing | Consumer | Non-performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   0
Fiscal year before current year 0   0
Two years before current year 0   0
Three years before current year 0   0
Four years before current year 0   0
Prior 1,566   1,607
Revolving loans amortized cost basis 0   0
Revolving loans converted to term 0   0
Loans and leases receivable 1,566   1,607
Installment      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans and leases receivable 785,106   777,905
Loans and leases receivable, charge-offs 9,932 $ 12,403  
Installment | Consumer      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 105,112   246,061
Fiscal year before current year 227,152   77,030
Two years before current year 65,827   180,395
Three years before current year 158,033   161,260
Four years before current year 131,183   40,315
Prior 58,871   32,732
Revolving loans amortized cost basis 38,928   40,111
Revolving loans converted to term 0   1
Loans and leases receivable 785,106   777,905
Current year, charge-offs 622   2,621
Fiscal year before current year, charge-offs 1,522   4,713
Two years before current fiscal year, charge-offs 1,338   12,790
Three years before current fiscal year, charge-offs 2,530   15,413
Four years before current fiscal year, charge-offs 2,904   6,457
Prior, charge-offs 1,016   2,809
Revolving loans amortized cost basis, charge-offs 0   0
Revolving loans converted to term, charge-offs 0   0
Loans and leases receivable, charge-offs 9,932   44,803
Installment | Consumer | Performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 105,112   245,697
Fiscal year before current year 226,706   76,563
Two years before current year 65,468   178,863
Three years before current year 156,478   159,650
Four years before current year 130,444   40,057
Prior 58,564   32,671
Revolving loans amortized cost basis 38,824   39,981
Revolving loans converted to term 0   1
Loans and leases receivable 781,596   773,483
Installment | Consumer | Non-performing      
Financing Receivable, Credit Quality Indicator [Line Items]      
Current year 0   364
Fiscal year before current year 446   467
Two years before current year 359   1,532
Three years before current year 1,555   1,610
Four years before current year 739   258
Prior 307   61
Revolving loans amortized cost basis 104   130
Revolving loans converted to term 0   0
Loans and leases receivable $ 3,510   $ 4,422