Accumulated Other Comprehensive Income - Schedule of Changes in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Shareholders' Equity at beginning of period	$ 239,670	$ 244,796
OCI, before Reclassifications, Net of Tax, Attributable to Parent	2,030	160
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	(244)	(317)
Net current-period other comprehensive income (loss)	1,786	(157)
Shareholders' Equity at end of period	213,536	239,670
Unrealized Investment Gain (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Shareholders' Equity at beginning of period	0	32
OCI, before Reclassifications, Net of Tax, Attributable to Parent	0	(32)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	0	0
Net current-period other comprehensive income (loss)	0	(32)
Shareholders' Equity at end of period	0	0
Postemployment Benefits Net Actuarial Gain (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Shareholders' Equity at beginning of period	1,980	2,105
OCI, before Reclassifications, Net of Tax, Attributable to Parent	699	192
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	(388)	(317)
Net current-period other comprehensive income (loss)	311	(125)
Shareholders' Equity at end of period	2,291	1,980
Interest Rate Swap Gain (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Shareholders' Equity at beginning of period	0	0
OCI, before Reclassifications, Net of Tax, Attributable to Parent	1,331	0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	144	0
Net current-period other comprehensive income (loss)	1,475	0
Shareholders' Equity at end of period	1,475	0
Accumulated Other Comprehensive Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Shareholders' Equity at beginning of period	1,980	2,137
Shareholders' Equity at end of period	$ 3,766	$ 1,980