Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total		Common Stock Outstanding [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]
Balance (in shares) at Jun. 30, 2015			27,361,000
Balance at Jun. 30, 2015	$ 580,918		$ 107,767	$ 1,219,119	$ (10,057)	$ (735,911)
Net income	121,764			121,764
Net pension and postretirement benefit gains (losses), net of tax effect	(1,293)				(1,293)
Cash dividends - common stock	(190,546)			(190,546)
Purchase of treasury stock (in shares)			(2,000)
Purchase of treasury stock	(155)					(155)
Stock-based plans (in shares)			65,000
Stock-based plans, including excess tax benefits	(416)		$ (416)
Stock-based compensation expense	3,326		$ 3,326
Balance (in shares) at Jun. 30, 2016			27,424,000
Balance at Jun. 30, 2016	513,598		$ 110,677	1,150,337	(11,350)	(736,066)
Net income	115,314	[1]		115,314
Net pension and postretirement benefit gains (losses), net of tax effect	2,414				2,414
Cash dividends - common stock	(58,980)			(58,980)
Purchase of treasury stock (in shares)			(6,000)
Purchase of treasury stock	(866)					(866)
Stock-based plans (in shares)			30,000
Stock-based plans, including excess tax benefits	249		$ 249
Stock-based compensation expense	$ 4,248		$ 4,248
Balance (in shares) at Jun. 30, 2017	27,448,424		27,448,000
Balance at Jun. 30, 2017	$ 575,977		$ 115,174	1,206,671	(8,936)	(736,932)
Net income	135,314	[2]		135,314
Net pension and postretirement benefit gains (losses), net of tax effect	2,566				2,566
Tax Cuts and Jobs Act of 2017, Reclassification from accumulated other comprehensive loss to retained earnings	0			1,889	(1,889)
Cash dividends - common stock	(64,531)			(64,531)
Purchase of treasury stock (in shares)			(9,000)
Purchase of treasury stock	(1,102)					(1,102)
Stock-based plans (in shares)			49,000
Stock-based plans	(981)		$ (981)
Stock-based compensation expense	$ 5,039		$ 5,039
Balance (in shares) at Jun. 30, 2018	27,487,989		27,488,000
Balance at Jun. 30, 2018	$ 652,282		$ 119,232	$ 1,279,343	$ (8,259)	$ (738,034)

[1] Included in the third quarter and fiscal year net income was 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.

[2] Included in the second quarter net income was the one-time preliminary deferred tax benefit of $8.9 million, or approximately $0.32 per diluted share, resulting from the Tax Act. The fiscal year impact was $9.5 million, or approximately $0.35 per diluted share.