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]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ 0
Beginning balance, shares at Jun. 30, 2016			39,057
Beginning 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 - $1.14, $1.18, and $1.22 per share for 2017, 2018, and 2019 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
Ending balance at Jun. 30, 2017			$ 10,000	164,655				1,033,751	(381,448)				(81,702)	745,256
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(326)
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 - $1.14, $1.18, and $1.22 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		38,703
Ending balance at Jun. 30, 2018	$ 814,963		$ 10,000	169,383				1,129,678	(403,875)				(90,223)	814,963
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	377
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 - $1.14, $1.18, and $1.22 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		95	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