Loans Receivable and Allowance for Credit Losses - Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 37,696	$ 32,698
Interest Income Recognized	63	38
Real estate loans \| One-to-four family
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	10,994	9,376
Interest Income Recognized	23	0
Real estate loans \| Multifamily
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	5,546	3,898
Interest Income Recognized	0	0
Real estate loans \| Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	5,998	5,717
Interest Income Recognized	6	38
Construction \| Construction
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,962	2,952
Interest Income Recognized	0	0
Commercial business loans
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	11,062	10,291
Interest Income Recognized	28	0
Home equity loans and advances \| Home equity loans and advances
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,134	464
Interest Income Recognized	$ 6	$ 0