Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Net income	$ 185,221	$ 186,182	$ 288,862
Net unamortized gains (losses) arising during the period	(1,544)	(1,587)	1,163
Amortization of net actuarial loss included in net periodic benefit cost	536	483	656
Amortization of prior service credit included in net periodic benefit cost	(3)	(7)	(13)
Settlement gain	0	5	0
Other comprehensive income (loss), before income taxes	(1,011)	(1,116)	1,806
Income tax benefit (expense) related to items of other comprehensive income (loss)	295	328	(559)
Other comprehensive income (loss)	(716)	(788)	1,247
Comprehensive income	184,505	185,394	290,109
Accumulated Other Comprehensive Income (Loss) [Member]
Other comprehensive income (loss)	$ (716)	$ (788)	$ 1,247