Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 7,416	$ 41,054	$ 39,344
Available-for-sale securities
Available-for-sale securities, Pre-tax	(44)	12	73
Available-for-sale securities, Tax	12	(3)	(19)
Available-for-sale securities, Net of Tax	(32)	9	54
Postemployment severance actuarial change
Postemployment severance actuarial change, Pre-tax	258	596	484
Postemployment severance actuarial change, Tax	(66)	(154)	(124)
Postemployment severance actuarial change, Net of Tax	192	442	360
Derivative gain (loss)
Derivative gain (loss), Pre-tax	0	0	(11)
Derivative gain (loss), Tax	0	0	2
Derivative gain (loss), Net of tax	0	0	(9)
Reclassification to (earnings) loss:
Amortization of actuarial change, Pre-tax	(427)	(338)	(404)
Amortization of actuarial change, Tax	110	87	104
Amortization of actuarial change, Net of Tax	(317)	(251)	(300)
Derivatives, Pre-tax	0	0	21
Derivatives, Tax	0	0	(5)
Derivatives, Net of Tax	0	0	16
Other comprehensive income (loss)
Other comprehensive income (loss), Pre-tax	(213)	270	163
Other comprehensive income (loss), Tax	56	(70)	(42)
Other comprehensive income (loss), Net of Tax	(157)	200	121
Total comprehensive income	$ 7,259	$ 41,254	$ 39,465