v3.26.1
Party-in-Interest Transactions (Details) - EBP 002 - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Contract administrator fees $ 75  
Total investments at fair value 42,861 $ 35,892
Loans outstanding $ 830 $ 626
Common Stock of Northfield Bancorp, Inc.    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Investment, number of shares (in shares) 281,962 302,947
Total investments at fair value $ 3,223 $ 3,520