Securities - Amortized Cost and Fair Value of Securities Available-for-Sale (Details) - USD ($) $ in Thousands		Dec. 31, 2025	Mar. 31, 2025		Jun. 30, 2024
Debt Securities, Available-for-Sale [Line Items]
Amortized cost		$ 374,773	$ 374,773	[1]	$ 376,179	[1]
Unrealized gains			1,567		910
Unrealized losses			20,908		27,088
Fair value		$ 355,432	355,432		350,001
US Treasury Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	[1]		10,819		43,024
Unrealized gains			0		0
Unrealized losses			444		1,829
Fair value			10,375		41,195
U.S. Government Sponsored Enterprises [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	[1]		13,032		13,042
Unrealized gains			0		0
Unrealized losses			1,556		2,068
Fair value			11,476		10,974
State and Political Subdivisions [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	[1]		207,811		169,842
Unrealized gains			1,355		828
Unrealized losses			0		1
Fair value			209,166		170,669
Mortgage-backed Securities-Residential [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	[1]		35,740		40,402
Unrealized gains			139		67
Unrealized losses			3,253		3,894
Fair value			32,626		36,575
Mortgage-backed Securities-Multi-family [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	[1]		88,970		90,261
Unrealized gains			0		0
Unrealized losses			14,985		17,961
Fair value			73,985		72,300
Corporate Debt Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	[1]		18,401		19,608
Unrealized gains			73		15
Unrealized losses			670		1,335
Fair value			$ 17,804		$ 18,288

[1] Amortized cost excludes accrued interest receivable of $5.2 million and $4.0 million at March 31, 2025 and June 30, 2024, respectively, which is included in accrued interest receivable in the consolidated statements of financial condition.