v3.25.1
Loans Receivable and Allowance for Credit Losses (Schedule of Aging Loans Receivable by Portfolio Segment and Class) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans $ 18,800,956 $ 18,667,570
Non-accrual 99,332 72,061
Non-accrual loans with no related allowance 87,145 55,674
Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 7,295,651 7,228,078
Multi-family    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 3,458,190 3,382,933
Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 756,356 823,503
Residential    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 1,994,404 2,010,637
Total Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 150,300 106,623
30-59 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 42,060 22,326
60-89 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 8,908 12,236
Recorded Investment > 90 days accruing    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Current    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 18,650,656 18,560,947
Mortgage loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 13,504,601 13,445,151
Non-accrual 74,400 46,162
Non-accrual loans with no related allowance 67,223 38,854
Mortgage loans | Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 7,295,651 7,228,078
Non-accrual 42,931 20,883
Non-accrual loans with no related allowance 35,753 13,575
Mortgage loans | Multi-family    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 3,458,190 3,382,933
Non-accrual 7,294 7,498
Non-accrual loans with no related allowance 7,294 7,498
Mortgage loans | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 756,356 823,503
Non-accrual 18,929 13,246
Non-accrual loans with no related allowance 18,930 13,246
Mortgage loans | Residential    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 1,994,404 2,010,637
Non-accrual 5,246 4,535
Non-accrual loans with no related allowance 5,246 4,535
Mortgage loans | Total Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 107,639 70,091
Mortgage loans | Total Past Due | Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 56,823 33,375
Mortgage loans | Total Past Due | Multi-family    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 14,727 7,498
Mortgage loans | Total Past Due | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 18,929 13,246
Mortgage loans | Total Past Due | Residential    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 17,160 15,972
Mortgage loans | 30-59 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 28,034 14,926
Mortgage loans | 30-59 Days | Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 13,696 8,538
Mortgage loans | 30-59 Days | Multi-family    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 7,433 0
Mortgage loans | 30-59 Days | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | 30-59 Days | Residential    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 6,905 6,388
Mortgage loans | 60-89 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 5,205 9,003
Mortgage loans | 60-89 Days | Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 196 3,954
Mortgage loans | 60-89 Days | Multi-family    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | 60-89 Days | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | 60-89 Days | Residential    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 5,009 5,049
Mortgage loans | Recorded Investment > 90 days accruing    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | Recorded Investment > 90 days accruing | Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | Recorded Investment > 90 days accruing | Multi-family    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | Recorded Investment > 90 days accruing | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | Recorded Investment > 90 days accruing | Residential    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Mortgage loans | Current    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 13,396,962 13,375,060
Mortgage loans | Current | Commercial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 7,238,828 7,194,703
Mortgage loans | Current | Multi-family    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 3,443,463 3,375,435
Mortgage loans | Current | Construction    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 737,427 810,257
Mortgage loans | Current | Residential    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 1,977,244 1,994,665
Commercial loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 4,682,902 4,608,600
Non-accrual 23,580 24,243
Non-accrual loans with no related allowance 18,570 15,164
Commercial loans | Total Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 38,851 30,868
Commercial loans | 30-59 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 12,422 4,248
Commercial loans | 60-89 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 2,849 2,377
Commercial loans | Recorded Investment > 90 days accruing    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Commercial loans | Current    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 4,644,051 4,577,732
Consumer loans    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 613,453 613,819
Non-accrual 1,352 1,656
Non-accrual loans with no related allowance 1,352 1,656
Consumer loans | Total Past Due    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 3,810 5,664
Consumer loans | 30-59 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 1,604 3,152
Consumer loans | 60-89 Days    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 854 856
Consumer loans | Recorded Investment > 90 days accruing    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans 0 0
Consumer loans | Current    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total gross loans $ 609,643 $ 608,155