Loans and Allowance for Credit Losses on Loans - Loans Balances by Internal Credit Quality Indicator (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Commercial Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 6,059		$ 6,059		$ 12,761
Fiscal year before latest fiscal year	11,766		11,766		8,919
Two years before latest fiscal year	8,921		8,921		14,688
Three years before latest fiscal year	13,186		13,186		14,621
Four years before latest fiscal year	13,639		13,639		5,134
Prior	18,110		18,110		16,379
Revolving loans amortized cost basis	41,035		41,035		38,169
Revolving loans converted to term	192		192		636
Total	112,908		112,908		111,307
Current fiscal year			0		0
Fiscal year before latest fiscal year			0		0
Two years before latest fiscal year			0		0
Three years before latest fiscal year			0		989
Four years before latest fiscal year			0		0
Prior			0		137
Revolving loans amortized cost basis			13		26
Revolving loans converted to term			0		0
Total	7	$ 6	13	$ 13	1,152
Residential Real Estate [Member] | Residential Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	20,573		20,573		55,070
Fiscal year before latest fiscal year	56,299		56,299		62,643
Two years before latest fiscal year	61,329		61,329		92,995
Three years before latest fiscal year	89,033		89,033		80,000
Four years before latest fiscal year	75,098		75,098		32,757
Prior	116,636		116,636		94,100
Revolving loans amortized cost basis	0		0		0
Revolving loans converted to term	0		0		24
Total	418,968		418,968		417,589
Current fiscal year			0		0
Fiscal year before latest fiscal year			0		0
Two years before latest fiscal year			0		0
Three years before latest fiscal year			0		0
Four years before latest fiscal year			44		0
Prior			0		0
Revolving loans amortized cost basis			0		0
Revolving loans converted to term			0		0
Total	0	0	44	0	0
Residential Real Estate [Member] | Performing [Member] | Residential Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	20,573		20,573		55,070
Fiscal year before latest fiscal year	56,299		56,299		62,643
Two years before latest fiscal year	61,329		61,329		92,995
Three years before latest fiscal year	88,973		88,973		79,815
Four years before latest fiscal year	75,098		75,098		32,588
Prior	113,759		113,759		91,936
Revolving loans amortized cost basis	0		0		0
Revolving loans converted to term	0		0		24
Total	416,031		416,031		415,071
Residential Real Estate [Member] | Non-performing [Member] | Residential Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
Fiscal year before latest fiscal year	0		0		0
Two years before latest fiscal year	0		0		0
Three years before latest fiscal year	60		60		185
Four years before latest fiscal year	0		0		169
Prior	2,877		2,877		2,164
Revolving loans amortized cost basis	0		0		0
Revolving loans converted to term	0		0		0
Total	2,937		2,937		2,518
Real Estate Mortgage [Member] | Commercial Real Estate Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	76,133		76,133		103,866
Fiscal year before latest fiscal year	116,414		116,414		213,520
Two years before latest fiscal year	199,525		199,525		248,878
Three years before latest fiscal year	242,650		242,650		126,588
Four years before latest fiscal year	122,799		122,799		83,907
Prior	219,412		219,412		154,802
Revolving loans amortized cost basis	3,675		3,675		4,716
Revolving loans converted to term	2,464		2,464		363
Total	983,072		983,072		936,640
Current fiscal year			0		0
Fiscal year before latest fiscal year			0		0
Two years before latest fiscal year			0		0
Three years before latest fiscal year			0		0
Four years before latest fiscal year			0		0
Prior			5		0
Revolving loans amortized cost basis			0		0
Revolving loans converted to term			0		0
Total	0	0	5	0	0
Home Equity [Member] | Consumer Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,649		1,649		5,929
Fiscal year before latest fiscal year	5,394		5,394		2,888
Two years before latest fiscal year	2,652		2,652		336
Three years before latest fiscal year	282		282		429
Four years before latest fiscal year	376		376		266
Prior	1,015		1,015		1,128
Revolving loans amortized cost basis	20,412		20,412		18,190
Revolving loans converted to term	0		0		0
Total	31,780		31,780		29,166
Current fiscal year			0		0
Fiscal year before latest fiscal year			0		0
Two years before latest fiscal year			0		0
Three years before latest fiscal year			0		0
Four years before latest fiscal year			0		0
Prior			0		0
Revolving loans amortized cost basis			13		0
Revolving loans converted to term			0		0
Total	0	0	13	0	0
Home Equity [Member] | Performing [Member] | Consumer Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,649		1,649		5,929
Fiscal year before latest fiscal year	5,394		5,394		2,888
Two years before latest fiscal year	2,652		2,652		336
Three years before latest fiscal year	282		282		429
Four years before latest fiscal year	376		376		266
Prior	1,013		1,013		1,128
Revolving loans amortized cost basis	20,380		20,380		18,143
Revolving loans converted to term	0		0		0
Total	31,746		31,746		29,119
Home Equity [Member] | Non-performing [Member] | Consumer Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
Fiscal year before latest fiscal year	0		0		0
Two years before latest fiscal year	0		0		0
Three years before latest fiscal year	0		0		0
Four years before latest fiscal year	0		0		0
Prior	2		2		0
Revolving loans amortized cost basis	32		32		47
Revolving loans converted to term	0		0		0
Total	34		34		47
Consumer Installment [Member] | Consumer Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,139		1,139		2,363
Fiscal year before latest fiscal year	1,697		1,697		1,217
Two years before latest fiscal year	947		947		689
Three years before latest fiscal year	503		503		277
Four years before latest fiscal year	215		215		83
Prior	83		83		65
Revolving loans amortized cost basis	88		88		77
Revolving loans converted to term	0		0		0
Total	4,672		4,672		4,771
Current fiscal year			158		393
Fiscal year before latest fiscal year			36		22
Two years before latest fiscal year			0		49
Three years before latest fiscal year			5		7
Four years before latest fiscal year			1		1
Prior			0		0
Revolving loans amortized cost basis			0		9
Revolving loans converted to term			0		0
Total	123	$ 154	200	$ 276	481
Consumer Installment [Member] | Performing [Member] | Consumer Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,139		1,139		2,363
Fiscal year before latest fiscal year	1,697		1,697		1,217
Two years before latest fiscal year	947		947		689
Three years before latest fiscal year	503		503		277
Four years before latest fiscal year	215		215		83
Prior	83		83		65
Revolving loans amortized cost basis	88		88		77
Revolving loans converted to term	0		0		0
Total	4,672		4,672		4,771
Consumer Installment [Member] | Non-performing [Member] | Consumer Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
Fiscal year before latest fiscal year	0		0		0
Two years before latest fiscal year	0		0		0
Three years before latest fiscal year	0		0		0
Four years before latest fiscal year	0		0		0
Prior	0		0		0
Revolving loans amortized cost basis	0		0		0
Revolving loans converted to term	0		0		0
Total	0		0		0
Pass [Member] | Commercial Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	6,059		6,059		12,761
Fiscal year before latest fiscal year	11,766		11,766		8,919
Two years before latest fiscal year	8,921		8,921		12,845
Three years before latest fiscal year	5,995		5,995		14,587
Four years before latest fiscal year	13,607		13,607		4,934
Prior	17,314		17,314		15,280
Revolving loans amortized cost basis	39,596		39,596		32,001
Revolving loans converted to term	0		0		636
Total	103,258		103,258		101,963
Pass [Member] | Real Estate Mortgage [Member] | Commercial Real Estate Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	76,133		76,133		103,537
Fiscal year before latest fiscal year	116,089		116,089		210,652
Two years before latest fiscal year	188,886		188,886		242,917
Three years before latest fiscal year	238,533		238,533		126,135
Four years before latest fiscal year	122,362		122,362		79,431
Prior	196,346		196,346		135,928
Revolving loans amortized cost basis	3,675		3,675		4,716
Revolving loans converted to term	2,464		2,464		363
Total	944,488		944,488		903,679
Special Mention [Member] | Commercial Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
Fiscal year before latest fiscal year	0		0		0
Two years before latest fiscal year	0		0		78
Three years before latest fiscal year	5,504		5,504		0
Four years before latest fiscal year	0		0		35
Prior	147		147		834
Revolving loans amortized cost basis	421		421		3,893
Revolving loans converted to term	192		192		0
Total	6,264		6,264		4,840
Special Mention [Member] | Real Estate Mortgage [Member] | Commercial Real Estate Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
Fiscal year before latest fiscal year	0		0		1,188
Two years before latest fiscal year	7,985		7,985		2,468
Three years before latest fiscal year	667		667		295
Four years before latest fiscal year	279		279		430
Prior	5,947		5,947		4,102
Revolving loans amortized cost basis	0		0		0
Revolving loans converted to term	0		0		0
Total	14,878		14,878		8,483
Substandard [Member] | Commercial Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		0
Fiscal year before latest fiscal year	0		0		0
Two years before latest fiscal year	0		0		1,765
Three years before latest fiscal year	1,687		1,687		34
Four years before latest fiscal year	32		32		165
Prior	649		649		265
Revolving loans amortized cost basis	1,018		1,018		2,275
Revolving loans converted to term	0		0		0
Total	3,386		3,386		4,504
Substandard [Member] | Real Estate Mortgage [Member] | Commercial Real Estate Portfolio [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0		0		329
Fiscal year before latest fiscal year	325		325		1,680
Two years before latest fiscal year	2,654		2,654		3,493
Three years before latest fiscal year	3,450		3,450		158
Four years before latest fiscal year	158		158		4,046
Prior	17,119		17,119		14,772
Revolving loans amortized cost basis	0		0		0
Revolving loans converted to term	0		0		0
Total	$ 23,706		$ 23,706		$ 24,478