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Condensed Consolidated Statement of Share Owners' Equity Statement - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Share Owners' Equity at Jun. 30, 2019	$ 369,854	$ 305,917	$ 133,982	$ (7,628)	$ (62,417)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,469		19,469
Other Comprehensive Income (Loss), Net of Tax	(7,271)			(7,271)
Stock Issued During Period, Value, Issued for Services	70	22			48
Compensation expense related to stock compensation plan	3,046	3,046
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 Owners' Equity at Mar. 31, 2020	375,388	305,906	153,451	(14,899)	(69,070)
Share Owners' Equity at Dec. 31, 2019	376,838	305,041	147,192	(8,945)	(66,450)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,259		6,259
Other Comprehensive Income (Loss), Net of Tax	(5,954)			(5,954)
Compensation expense related to stock compensation plan	908	908
Performance Share Issuance	23	(11)			34
Deferred Share Issuance	0	(32)			32
Treasury Stock, Value, Acquired, Cost Method	(2,686)				(2,686)
Share Owners' Equity at Mar. 31, 2020	375,388	305,906	153,451	(14,899)	(69,070)
Share Owners' Equity at Jun. 30, 2020	379,365	306,808	152,178	(10,551)	(69,070)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	42,345		42,345
Other Comprehensive Income (Loss), Net of Tax	4,233			4,233
Stock Issued During Period, Value, Issued for Services	65	19			46
Compensation expense related to stock compensation plan	2,724	2,724
Performance Share Issuance	(771)	(2,524)			1,753
Deferred Share Issuance	0	(30)			30
Treasury Stock, Value, Acquired, Cost Method	(2,996)				(2,996)
Share Owners' Equity at Mar. 31, 2021	424,965	306,997	194,523	(6,318)	(70,237)
Share Owners' Equity at Dec. 31, 2020	419,638	306,120	184,051	(266)	(70,267)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,472		10,472
Other Comprehensive Income (Loss), Net of Tax	(6,052)			(6,052)
Compensation expense related to stock compensation plan	907	907
Deferred Share Issuance	0	(30)			30
Share Owners' Equity at Mar. 31, 2021	$ 424,965	$ 306,997	$ 194,523	$ (6,318)	$ (70,237)

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