Statements of Consolidated Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Stock Options and Stock Appreciation Rights [ Member]	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Stock Options and Stock Appreciation Rights [ Member]	Additional Paid-in Capital Performance Shares [Member]	Additional Paid-in Capital Restricted Stock Units (RSUs) [Member]	Retained Earnings	Treasury Shares-at Cost	Treasury Shares-at Cost Stock Options and Stock Appreciation Rights [ Member]	Treasury Shares-at Cost Performance Shares [Member]	Treasury Shares-at Cost Restricted Stock Units (RSUs) [Member]	Accumulated Other Comprehensive Income (Loss)	Parent [Member]	Parent [Member] Stock Options and Stock Appreciation Rights [ Member]	Parent [Member] Performance Shares [Member]	Parent [Member] Restricted Stock Units (RSUs) [Member]
Beginning balance, shares at Jun. 30, 2015			39,905
Beginning balance at Jun. 30, 2015			$ 10,000	$ 160,072				$ 969,548	$ (338,121)				$ (60,171)	$ 741,328
Net income	$ 29,577													29,577
Other comprehensive income (loss)	(25,375)												(25,375)	(25,375)
Cash dividends - $1.10, $1.14 and $1.18 per share for 2016, 2017 and 2018 respectively								(54,266)						(54,266)
Purchases of common stock for treasury, shares			(951)
Purchases of common stock for treasury									(37,465)					(37,465)
Treasury shares issued for:
Exercise of stock appreciation rights and options, shares			64
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units					$ (391)	$ (308)	$ (530)
Exercise of stock appreciation rights and options										$ 1,000
Performance share awards, shares			8
Performance share awards											$ 116
Restricted stock units, shares			15
Restricted stock units												$ 232
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units															$ 609	$ (192)	$ (298)
Compensation expense				2,524	1,543									2,524	1,543
Other, shares			16
Other				(381)				(38)	350					(69)
Ending balance, shares at Jun. 30, 2016			39,057
Ending balance at Jun. 30, 2016			$ 10,000	162,529				944,821	(373,888)				(85,546)	657,916
Net income	133,910													133,910
Other comprehensive income (loss)	$ 3,844												3,844	3,844
Cash dividends - $1.10, $1.14 and $1.18 per share for 2016, 2017 and 2018 respectively								(45,005)						(45,005)
Purchases of common stock for treasury, shares			(163)
Purchases of common stock for treasury									(8,242)					(8,242)
Treasury shares issued for:
Exercise of stock appreciation rights and options, shares			111
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units					(2,218)	(360)	(624)
Exercise of stock appreciation rights and options										105
Performance share awards, shares			10
Performance share awards											126
Restricted stock units, shares			15
Restricted stock units												227
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units															(2,113)	(234)	(397)
Compensation expense				3,629	1,891									3,629	1,891
Other, shares			11
Other				(192)				25	224					57
Ending balance, shares at Jun. 30, 2017	39,041		39,041
Ending balance at Jun. 30, 2017	$ 745,256		$ 10,000	164,655				1,033,751	(381,448)				(81,702)	745,256
Net income	141,625													141,625
Other Comprehensive Income (Loss) before Reclassifications, Tax													(8,050)	(8,050)
Other comprehensive income (loss)	$ (8,521)												(8,521)
Reclassification of certain income tax effects to retained earnings, net amount | Adjustments for New Accounting Pronouncement [Member]								471					(471)	0
Cash dividends - $1.10, $1.14 and $1.18 per share for 2016, 2017 and 2018 respectively								(46,162)						(46,162)
Purchases of common stock for treasury, shares			(393)
Purchases of common stock for treasury									(22,778)					(22,778)
Treasury shares issued for:
Exercise of stock appreciation rights and options, shares		58	19
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units					(482)	$ (273)	$ (740)
Exercise of stock appreciation rights and options										$ 84
Performance share awards, shares			5
Performance share awards											$ (24)
Restricted stock units, shares			15
Restricted stock units												$ (56)
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units															(398)	$ (297)	$ (796)
Compensation expense				4,666	$ 1,961									4,666	$ 1,961
Other, shares			16
Other				(404)				(7)	347					(64)
Ending balance, shares at Jun. 30, 2018	38,703		38,703
Ending balance at Jun. 30, 2018	$ 814,963		$ 10,000	$ 169,383				$ 1,129,678	$ (403,875)				$ (90,223)	$ 814,963