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, 2017			39,041
Beginning balance at Jun. 30, 2017			$ 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 from accumulated other comprehensive loss								471					(471)	0
Cash dividends - $1.18, $1.22, and $1.26 per share for 2017, 2018, and 2019 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			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
Ending balance at Jun. 30, 2018			$ 10,000	169,383				1,129,678	(403,875)				(90,223)	814,963
Net income	143,993													143,993
Other comprehensive income (loss)	$ (9,663)												(9,663)	(9,663)
Cumulative effect of adopting accounting standards | Adjustments for New Accounting Pronouncement [Member]								3,056						3,056
Cash dividends - $1.18, $1.22, and $1.26 per share for 2017, 2018, and 2019 respectively								(47,621)						(47,621)
Purchases of common stock for treasury, shares			(192)
Purchases of common stock for treasury									(11,158)					(11,158)
Treasury shares issued for:
Exercise of stock appreciation rights and options, shares			30
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units					(1,069)	(844)	(1,057)
Exercise of stock appreciation rights and options										(59)
Performance share awards, shares			18
Performance share awards											(301)
Restricted stock units, shares			23
Restricted stock units												(120)
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units															(1,128)	(1,145)	(1,177)
Compensation expense				4,474	2,437									4,474	2,437
Other, shares			15
Other				(393)				42	354					3
Ending balance, shares at Jun. 30, 2019	38,597		38,597
Ending balance at Jun. 30, 2019	$ 897,034		$ 10,000	172,931				1,229,148	(415,159)				(99,886)	897,034
Net income	24,042													24,042
Other comprehensive income (loss)	$ (29,544)												(29,544)	(29,544)
Cumulative effect of adopting accounting standards | Adjustments for New Accounting Pronouncement [Member]								(3,275)						(3,275)
Cash dividends - $1.18, $1.22, and $1.26 per share for 2017, 2018, and 2019 respectively								(49,305)						(49,305)
Treasury shares issued for:
Exercise of stock appreciation rights and options, shares		139	43
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units					(730)	$ (1,540)	$ (671)
Exercise of stock appreciation rights and options										$ 71
Performance share awards, shares			36
Performance share awards											$ 362
Restricted stock units, shares			17
Restricted stock units												$ 213
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units															(659)	$ (1,178)	$ (458)
Compensation expense				4,000	$ 2,954									4,000	$ 2,954
Other, shares			17
Other				(452)				(40)	423					(69)
Ending balance, shares at Jun. 30, 2020	38,710		38,710
Ending balance at Jun. 30, 2020	$ 843,542		$ 10,000	$ 176,492				$ 1,200,570	$ (414,090)				$ (129,430)	$ 843,542