Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017		Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net Income	$ 115,314	[1]	$ 121,764	$ 101,686
Defined Benefit Pension and Postretirement Benefit Plans:
Net gain (loss) arising during the period, before tax	3,334		(4,200)	(3,563)
Prior service credit arising during the period, before tax	0		1,770	0
Amortization of loss, before tax	677		505	401
Amortization of prior service credit, before tax	(182)		(126)	(5)
Total Other Comprehensive Income (Loss), Before Tax	3,829		(2,051)	(3,167)
Tax Attributes of Items in Other Comprehensive Income (Loss):
Net gain (loss) arising during the period, tax	(1,231)		1,551	1,318
Prior service credit arising during the period, tax	0		(654)	0
Amortization of loss, tax	(250)		(186)	(149)
Amortization of prior service credit, tax	66		47	2
Total Tax (Expense) Benefit	(1,415)		758	1,171
Other Comprehensive Income (Loss), Net of Tax	2,414		(1,293)	(1,996)
Comprehensive Income	$ 117,728		$ 120,471	$ 99,690

[1] Included in the third quarter and fiscal year net income is expense of $11.5 million, net of taxes, or approximately $0.42 per diluted share, related to a multiemployer pension settlement and other benefit-related costs.