Loans Receivable - Loans Modified with Payment Default (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Term extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified	$ 275	$ 31
Payment delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified		1,964
Personal Banking \| Term extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified	275	31
Personal Banking \| Term extension \| Residential mortgage loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified	275	31
Personal Banking \| Term extension \| Home equity loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified	0	0
Personal Banking \| Payment delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified		179
Personal Banking \| Payment delay \| Residential mortgage loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified		179
Personal Banking \| Payment delay \| Home equity loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified		0
Commercial Banking \| Term extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified	0	0
Commercial Banking \| Term extension \| Commercial real estate loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified	0	0
Commercial Banking \| Term extension \| Commercial and industrial loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified	$ 0	0
Commercial Banking \| Payment delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified		1,785
Commercial Banking \| Payment delay \| Commercial real estate loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified		0
Commercial Banking \| Payment delay \| Commercial and industrial loans
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans with payment default and modified		$ 1,785