Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 5,691	$ 6,295	$ (23,816)	$ (20,068)
Postemployment severance actuarial change
Postemployment severance actuarial change, Pre-tax	156	251	529	814
Postemployment severance actuarial change, Tax	(40)	(66)	(136)	(211)
Postemployment severance actuarial change, Net of Tax	116	185	393	603
Unrealized gain (loss) on interest rate swap
Unrealized gain (loss) on interest rate swap, Pre-tax	(145)	1,345	920	1,446
Unrealized gain (loss) on interest rate swap, Tax	37	(347)	(237)	(373)
Unrealized gain (loss) on interest rate swap, Net of tax	(108)	998	683	1,073
Amortization of actuarial change
Amortization of actuarial change, Pre-tax	(161)	(129)	(493)	(399)
Amortization of actuarial change, Tax	42	34	127	103
Amortization of actuarial change, Net of Tax	(119)	(95)	(366)	(296)
Interest rate swap, Pre-tax	(381)	62	(798)	195
Interest rate swap, Tax	98	(16)	205	(50)
Interest rate swap, Net of Tax	(283)	46	(593)	145
Other comprehensive income (loss)
Other comprehensive income (loss), Pre-tax	(531)	1,529	158	2,056
Other comprehensive income (loss), Tax	137	(395)	(41)	(531)
Other comprehensive income (loss)	(394)	1,134	117	1,525
Total comprehensive income (loss)	$ 5,297	$ 7,429	$ (23,699)	$ (18,543)