Consolidated Statements of Share Owners' Equity - USD ($) $ in Thousands	Total	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Share Owner's Equity at Jun. 30, 2017	$ 342,272	$ 302,483	$ 82,671	$ (9,084)	$ (33,798)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	16,752		16,752
Other comprehensive income (loss), Net of Tax	2,136			2,136
Tax Reform impact	0		(49)	49
Issuance of non-restricted stock	155	65			90
Compensation expense related to stock compensation plan	5,138	5,138
Performance Share Issuance	(1,508)	(3,471)			1,963
Treasury Stock, Value, Acquired, Cost Method	(9,418)				(9,418)
Share Owner's Equity at Jun. 30, 2018	355,527	304,215	99,374	(6,899)	(41,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	31,558		31,558
Other comprehensive income (loss), Net of Tax	(729)			(729)
Cumulative effect of accounting change	3,050		3,050
Issuance of non-restricted stock	72	28			44
Compensation expense related to stock compensation plan	5,569	5,569
Performance Share Issuance	(1,762)	(3,895)			2,133
Treasury Stock, Value, Acquired, Cost Method	(23,431)				(23,431)
Share Owner's Equity at Jun. 30, 2019	369,854	305,917	133,982	(7,628)	(62,417)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	18,196		18,196
Other comprehensive income (loss), Net of Tax	(2,923)			(2,923)
Issuance of non-restricted stock	70	22			48
Compensation expense related to stock compensation plan	3,948	3,948
Performance Share Issuance	(986)	(3,047)			2,061
Deferred Share Issuance	0	(32)			32
Treasury Stock, Value, Acquired, Cost Method	(8,794)				(8,794)
Share Owner's Equity at Jun. 30, 2020	$ 379,365	$ 306,808	$ 152,178	$ (10,551)	$ (69,070)