Condensed Statements of Shareholder's Equity Condensed Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Common Stock [Member] Stock Options and Stock Appreciation Rights [ Member]	Common Stock [Member] Performance Shares [Member]	Common Stock [Member] Restricted Stock Units (RSUs) [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Stock Options and Stock Appreciation Rights [ Member]	Additional Paid-in Capital [Member] Performance Shares [Member]	Additional Paid-in Capital [Member] Restricted Stock Units (RSUs) [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Treasury Stock [Member] Stock Options and Stock Appreciation Rights [ Member]	Treasury Stock [Member] Performance Shares [Member]	Treasury Stock [Member] Restricted Stock Units (RSUs) [Member]	Total Accumulated Other Comprehensive Income (Loss) [Member]	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, 2021		38,516
Beginning balance at Jun. 30, 2021		$ 10,000				$ 177,014				$ 1,294,413	$ (455,789)				$ (93,092)	$ 932,546
Net income	$ 52,969															52,969
Other comprehensive (loss) income															(4,731)	(4,731)
Cash Dividends per Common Share	$ 0.33
Cash dividends
Treasury Stock, Shares, Acquired		(77)
Treasury Stock, Value, Acquired, Cost Method											(6,537)					(6,537)
Exercise of stock appreciation rights and options, shares			3
Performance share awards, shares				5
Restricted stock units, shares					12
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units							$ (116)	$ (222)	$ (572)
Exercise of stock appreciation rights and options												$ (8)
Performance share awards													$ (73)
Restricted stock units														$ (120)
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units																	$ (108)	$ (295)	$ (692)
Compensation expense						1,563	1,907									1,563	1,907
Stockholders' Equity, Other Shares		(2)
Other										(7)	(45)					(52)
Ending balance, shares at Sep. 30, 2021		38,457
Ending balance at Sep. 30, 2021		$ 10,000				179,574				1,347,375	(462,556)				(97,823)	976,570
Beginning balance, shares at Jun. 30, 2021		38,516
Beginning balance at Jun. 30, 2021		$ 10,000				177,014				1,294,413	(455,789)				(93,092)	932,546
Net income	$ 109,995
Other comprehensive (loss) income	$ 157														157
Cash Dividends per Common Share	$ 0.33
Ending balance, shares at Dec. 31, 2021		38,453
Ending balance at Dec. 31, 2021		$ 10,000				180,248				1,391,655	(467,279)				(92,935)	1,021,689
Beginning balance, shares at Sep. 30, 2021		38,457
Beginning balance at Sep. 30, 2021		$ 10,000				179,574				1,347,375	(462,556)				(97,823)	976,570
Net income	$ 57,026															57,026
Other comprehensive (loss) income	4,888														4,888	4,888
Cash dividends										(12,759)						(12,759)
Treasury Stock, Shares, Acquired		(35)
Treasury Stock, Value, Acquired, Cost Method											(3,527)					(3,527)
Exercise of stock appreciation rights and options, shares			35
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units							(1,639)
Exercise of stock appreciation rights and options												(832)
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units																	(2,471)
Compensation expense						1,705	609									1,705	609
Stockholders' Equity, Other Shares		(4)
Other						(1)				13	(364)					(352)
Ending balance, shares at Dec. 31, 2021		38,453
Ending balance at Dec. 31, 2021		$ 10,000				180,248				1,391,655	(467,279)				(92,935)	1,021,689
Beginning balance, shares at Jun. 30, 2022		38,499
Beginning balance at Jun. 30, 2022	1,149,355	$ 10,000				183,822				1,499,676	(471,848)				(72,295)	1,149,355
Net income	$ 76,880															76,880
Other comprehensive (loss) income															(1,635)	(1,635)
Cash Dividends per Common Share	$ 0.34
Cash dividends
Treasury Stock, Shares, Acquired		(8)
Treasury Stock, Value, Acquired, Cost Method											(716)					(716)
Exercise of stock appreciation rights and options, shares			21
Performance share awards, shares				23
Restricted stock units, shares					33
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units							(860)	$ (1,290)	$ (1,668)
Exercise of stock appreciation rights and options												(366)
Performance share awards													$ (758)
Restricted stock units														$ (902)
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units																	(1,226)	$ (2,048)	$ (2,570)
Compensation expense						1,939	1,424									1,939	1,424
Stockholders' Equity, Other Shares		3
Other						(19)				(5)	61					37
Ending balance, shares at Sep. 30, 2022		38,571
Ending balance at Sep. 30, 2022		$ 10,000				183,348				1,576,551	(474,529)				(73,930)	1,221,440
Beginning balance, shares at Jun. 30, 2022		38,499
Beginning balance at Jun. 30, 2022	$ 1,149,355	$ 10,000				183,822				1,499,676	(471,848)				(72,295)	1,149,355
Net income	157,337
Other comprehensive (loss) income	4,909														4,909
Ending balance, shares at Dec. 31, 2022		38,599
Ending balance at Dec. 31, 2022	1,295,876	$ 10,000				184,795				1,643,874	(475,407)				(67,386)	1,295,876
Beginning balance, shares at Sep. 30, 2022		38,571
Beginning balance at Sep. 30, 2022		$ 10,000				183,348				1,576,551	(474,529)				(73,930)	1,221,440
Net income	80,457															80,457
Other comprehensive (loss) income	$ 6,544														6,544	6,544
Cash Dividends per Common Share	$ 0.34
Cash dividends										(13,175)						(13,175)
Exercise of stock appreciation rights and options, shares			28
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units							(1,061)
Exercise of stock appreciation rights and options												$ (878)
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units																	(1,939)
Compensation expense						2,062	$ 447									2,062	$ 447
Stockholders' Equity, Other Shares
Other						(1)				41						40
Ending balance, shares at Dec. 31, 2022		38,599
Ending balance at Dec. 31, 2022	$ 1,295,876	$ 10,000				$ 184,795				$ 1,643,874	$ (475,407)				$ (67,386)	$ 1,295,876