Credit Quality and Allowance for Credit Losses - Summary of Financial Impacts of Loan Modifications (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)
One- to four-family first mortgage \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Payment Deferral (dollars in thousands)	$ 0	$ 0
One- to four-family first mortgage \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	0 months	60 months
Weighted-Average Interest Rate Reduction	0	0
Home equity loans and lines \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Payment Deferral (dollars in thousands)	$ 0	$ 0
Home equity loans and lines \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	0 months	0 months
Weighted-Average Interest Rate Reduction	0	0
Commercial real estate \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Payment Deferral (dollars in thousands)	$ 0	$ 0
Commercial real estate \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	5 months	12 months
Weighted-Average Interest Rate Reduction	0	0
Construction and land \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Payment Deferral (dollars in thousands)	$ 0	$ 0
Construction and land \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	0 months	3 months
Weighted-Average Interest Rate Reduction	0	0
Multi-family residential \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Payment Deferral (dollars in thousands)	$ 0	$ 0
Multi-family residential \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	0 months	0 months
Weighted-Average Interest Rate Reduction	0	0
Commercial and industrial \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Payment Deferral (dollars in thousands)	$ 0	$ 0
Commercial and industrial \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	3 months	3 months
Weighted-Average Interest Rate Reduction	0.015	0
Consumer \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Payment Deferral (dollars in thousands)	$ 0	$ 0
Consumer \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	0 months	0 months
Weighted-Average Interest Rate Reduction	0	0

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