Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 10,957	$ 10,998
Other comprehensive income (loss):
Available-for-sale securities, Pre-tax	14	(23)
Available-for-sale securities, Tax	(5)	9
Available-for-sale securities, Net of Tax	9	(14)
Postemployment severance actuarial change, Pre-tax	267	243
Postemployment severance actuarial change, Tax	(104)	(94)
Postemployment severance actuarial change, Net of Tax	163	149
Reclassification to (earnings) loss:
Amortization of actuarial change, Pre-tax	(67)	(145)
Amortization of actuarial change, Tax	26	56
Amortization of actuarial change, Net of Tax	(41)	(89)
Other comprehensive income (loss), Pre-tax	214	75
Other comprehensive income (loss), Tax	(83)	(29)
Other comprehensive income (loss), Net of Tax	131	46
Total comprehensive income	$ 11,088	$ 11,044