v3.26.1
Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale $ 1,378,502 $ 1,412,419
Trading securities 13,831 15,215
Investment measured at fair value 5,000 5,000
Commercial real estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 2,265 2,718
Multifamily    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 1,671 1,681
U.S. Government agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 539 558
Pass-through certificates, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 443,706 506,949
Other debt securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 48,392 32,813
Measured on a recurring basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 1,378,502 1,412,419
Trading securities 13,831 15,215
Equity securities 0 0
Total 1,392,333 1,427,634
Measured on a recurring basis | U.S. Government agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 539 558
Measured on a recurring basis | Mortgage-backed securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 1,329,571 1,379,048
Measured on a recurring basis | Pass-through certificates, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 443,706 506,949
Measured on a recurring basis | REMICs, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 885,865 872,099
Measured on a recurring basis | Municipal bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 614 614
Measured on a recurring basis | Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 47,778 32,199
Measured on a recurring basis | Other debt securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 48,392 32,813
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Trading securities 13,831 15,215
Equity securities 0 0
Total 13,831 15,215
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Government agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pass-through certificates, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | REMICs, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other debt securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 1,378,502 1,412,419
Trading securities 0 0
Equity securities 0 0
Total 1,378,502 1,412,419
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Government agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 539 558
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 1,329,571 1,379,048
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Pass-through certificates, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 443,706 506,949
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | REMICs, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 885,865 872,099
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Municipal bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 614 614
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 47,778 32,199
Measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Other debt securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 48,392 32,813
Measured on a recurring basis | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Trading securities 0 0
Equity securities 0 0
Total 0 0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | U.S. Government agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Pass-through certificates, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | REMICs, GSE    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Municipal bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Other debt securities:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale 0 0
Measured on a non-recurring basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 6,715 7,189
Measured on a non-recurring basis | Real estate loans:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 3,936 4,399
Measured on a non-recurring basis | Real estate loans: | Commercial real estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 2,265 2,718
Measured on a non-recurring basis | Real estate loans: | Multifamily    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 1,671 1,681
Measured on a non-recurring basis | Commercial and industrial loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 2,779 2,790
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 0 0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans: | Commercial real estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Real estate loans: | Multifamily    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial and industrial loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 0 0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Real estate loans:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Real estate loans: | Commercial real estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Real estate loans: | Multifamily    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Significant Other Observable Inputs (Level 2) | Commercial and industrial loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 0 0
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 6,715 7,189
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans:    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 3,936 4,399
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans: | Commercial real estate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 2,265 2,718
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Real estate loans: | Multifamily    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment 1,671 1,681
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3) | Commercial and industrial loans    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans individually evaluated for impairment $ 2,779 $ 2,790