Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Net income	$ 7,954	$ 5,850	$ 28,235	$ 24,185
Other comprehensive income (loss):
Available-for-sale securities, Pre-tax	27	0	42	(30)
Available-for-sale securities, Tax	(7)	(4)	(11)	8
Available-for-sale securities, Net of Tax	20	(4)	31	(22)
Postemployment severance actuarial change, Pre-tax	100	87	338	593
Postemployment severance actuarial change, Tax	(26)	(30)	(87)	(218)
Postemployment severance actuarial change, Net of Tax	74	57	251	375
Derivative gain (loss), Pre-tax			(11)	0
Derivative gain (loss), Tax			2	0
Derivative gain (loss), Net of Tax			(9)	0
Reclassification to (earnings) loss:
Available-for-sale securities, Pre-tax	0	1	0	4
Available-for-sale securities, Tax	0	0	0	(1)
Available-for-sale securities, Net of Tax	0	1	0	3
Amortization of actuarial change, Pre-tax	(100)	(58)	(302)	(191)
Amortization of actuarial change, Tax	26	19	78	62
Amortization of actuarial change, Net of Tax	(74)	(39)	(224)	(129)
Derivatives, Pre-tax			21	0
Derivatives, Tax			(5)	0
Derivatives, Net of Tax			16	0
Other comprehensive income (loss), Pre-tax	27	30	88	376
Other comprehensive income (loss), Tax	(7)	(15)	(23)	(149)
Other comprehensive income (loss), Net of Tax	20	15	65	227
Total comprehensive income	$ 7,974	$ 5,865	$ 28,300	$ 24,412