v3.26.1
Fair Value - Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Available-for-sale securities, at fair value $ 84,774 $ 92,196
Held-to-maturity securities, at amortized cost, net 253,616  
Mortgage loans held for sale, at fair value 3,050 3,388
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 140,010 126,154
Available-for-sale securities, at fair value 84,774 92,196
Held-to-maturity securities, at amortized cost, net 253,616 272,982
Placement with banks 249 249
Mortgage loans held for sale, at fair value 3,050 3,388
Loans receivable, net 2,879,740 2,599,258
Accrued interest receivable 19,939 17,905
FHLBNY stock 30,689 29,309
FRBNY stock 10,714 10,698
Demand deposits 251,919 208,250
Interest-bearing deposits 1,281,105 1,133,882
Certificates of deposit 738,785 704,503
Borrowings 621,100 596,100
Accrued interest payable 3,837 3,788
Fair Value Measurements    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 140,010 126,154
Available-for-sale securities, at fair value 84,774 92,196
Held-to-maturity securities, at amortized cost, net 246,965 268,875
Placement with banks 249 249
Mortgage loans held for sale, at fair value 3,050 3,388
Loans receivable, net 2,829,981 2,577,298
Accrued interest receivable 19,939 17,905
FHLBNY stock 30,689 29,309
FRBNY stock 10,714 10,698
Demand deposits 251,919 208,250
Interest-bearing deposits 1,281,105 1,133,882
Certificates of deposit 736,321 704,205
Borrowings 615,539 595,031
Accrued interest payable 3,837 3,788
Fair Value Measurements | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 140,010 126,154
Available-for-sale securities, at fair value 733 3,471
FHLBNY stock 30,689 29,309
FRBNY stock 10,714  
Demand deposits 251,919 208,250
Interest-bearing deposits 1,281,105 1,133,882
Fair Value Measurements | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Available-for-sale securities, at fair value 84,041 88,725
Held-to-maturity securities, at amortized cost, net 246,965 268,875
Placement with banks 249 249
Mortgage loans held for sale, at fair value 3,050 3,388
Accrued interest receivable 19,939 17,905
FRBNY stock   10,698
Certificates of deposit 736,321 704,205
Borrowings 615,539 595,031
Accrued interest payable 3,837 3,788
Fair Value Measurements | Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans receivable, net $ 2,829,981 $ 2,577,298