Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 6,295	$ (4,529)	$ (20,068)	$ 19
Available-for-sale securities
Available-for-sale securities, Pre-tax	0	(4)	0	(42)
Available-for-sale securities, Tax	0	1	0	11
Available-for-sale securities, Net of Tax	0	(3)	0	(31)
Postemployment severance actuarial change
Postemployment severance actuarial change, Pre-tax	251	174	814	476
Postemployment severance actuarial change, Tax	(66)	(45)	(211)	(123)
Postemployment severance actuarial change, Net of Tax	185	129	603	353
Unrealized gain (loss) on interest rate swap
Unrealized gain (loss) on interest rate swap, Pre-tax	1,345	0	1,446	0
Unrealized gain (loss) on interest rate swap, Tax	(347)	0	(373)	0
Unrealized gain (loss) on interest rate swap, Net of tax	998	0	1,073	0
Amortization of actuarial change
Amortization of actuarial change, Pre-tax	(129)	(112)	(399)	(333)
Amortization of actuarial change, Tax	34	29	103	86
Amortization of actuarial change, Net of Tax	(95)	(83)	(296)	(247)
Interest rate swap, Pre-tax	62	0	195	0
Interest rate swap, Tax	(16)	0	(50)	0
Interest rate swap, Net of Tax	46	0	145	0
Other comprehensive income (loss)
Other comprehensive income (loss), Pre-tax	1,529	58	2,056	101
Other comprehensive income (loss), Tax	(395)	(15)	(531)	(26)
Other comprehensive income (loss)	1,134	43	1,525	75
Total comprehensive income (loss)	$ 7,429	$ (4,486)	$ (18,543)	$ 94