Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income	Treasury Stock	Class A Common Stock Common Stock	Class B Common Stock Common Stock
Shareholders' Equity at beginning of period at Jun. 30, 2019	$ 216,490		$ 3,570	$ 277,391		$ 1,937	$ (68,559)	$ 12	$ 2,139
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net Income (Loss)	41,054			41,054
Other comprehensive income (loss)	200					200
Issuance of non-restricted stock (34,000 shares in 2020, 45,000 shares in 2021, 45,000 shares in 2022)	0		(440)				440
Conversion of Class A to Class B common stock (58,000 shares in 2020, 5,000 shares in 2021, 5,000 shares in 2022)	0		(21)				21	(2)	2
Compensation expense related to stock incentive plans	5,454		5,454
Performance share issuance (67,000 shares in 2020)	(512)		(1,391)				879
Restricted stock units issuance (99,000 shares in 2020, 163,000 shares in 2021, 204,000 shares in 2022)	(455)		(1,768)				1,313
Relative total shareholder return performance units issuance (48,000 shares in 2020, 32,000 shares in 2021, 5,000 shares in 2022)	(330)		(954)				624
Reclassification of equity-classified awards	(680)		(680)
Repurchase of Common Stock (146,000 shares in 2020, 278,000 shares in 2021, 285,000 shares in 2022)	(3,004)						(3,004)
Dividends declared ($0.36 per share in 2020, $0.36 per share in 2021, $0.36 per share in 2022)	(13,421)			(13,421)
Shareholders' Equity at end of period at Jun. 30, 2020	244,796	$ 134	3,770	305,024	$ 134	2,137	(68,286)	10	2,141
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net Income (Loss)	7,416			7,416
Other comprehensive income (loss)	(157)					(157)
Issuance of non-restricted stock (34,000 shares in 2020, 45,000 shares in 2021, 45,000 shares in 2022)	(23)		(617)				594
Conversion of Class A to Class B common stock (58,000 shares in 2020, 5,000 shares in 2021, 5,000 shares in 2022)	0							(1)	1
Compensation expense related to stock incentive plans	5,676		5,676
Restricted stock units issuance (99,000 shares in 2020, 163,000 shares in 2021, 204,000 shares in 2022)	(805)		(2,945)				2,140
Relative total shareholder return performance units issuance (48,000 shares in 2020, 32,000 shares in 2021, 5,000 shares in 2022)	(156)		(586)				430
Repurchase of Common Stock (146,000 shares in 2020, 278,000 shares in 2021, 285,000 shares in 2022)	(3,671)						(3,671)
Dividends declared ($0.36 per share in 2020, $0.36 per share in 2021, $0.36 per share in 2022)	(13,540)			(13,540)
Shareholders' Equity at end of period at Jun. 30, 2021	239,670		5,298	299,034		1,980	(68,793)	9	2,142
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net Income (Loss)	(15,714)			(15,714)
Other comprehensive income (loss)	1,786					1,786
Issuance of non-restricted stock (34,000 shares in 2020, 45,000 shares in 2021, 45,000 shares in 2022)	(6)		(597)				591
Conversion of Class A to Class B common stock (58,000 shares in 2020, 5,000 shares in 2021, 5,000 shares in 2022)	0							(1)	1
Compensation expense related to stock incentive plans	5,143		5,143
Restricted stock units issuance (99,000 shares in 2020, 163,000 shares in 2021, 204,000 shares in 2022)	(782)		(3,436)				2,654
Relative total shareholder return performance units issuance (48,000 shares in 2020, 32,000 shares in 2021, 5,000 shares in 2022)	(32)		(104)				72
Repurchase of Common Stock (146,000 shares in 2020, 278,000 shares in 2021, 285,000 shares in 2022)	(3,042)						(3,042)
Dividends declared ($0.36 per share in 2020, $0.36 per share in 2021, $0.36 per share in 2022)	(13,487)			(13,487)
Shareholders' Equity at end of period at Jun. 30, 2022	$ 213,536		$ 6,304	$ 269,833		$ 3,766	$ (68,518)	$ 8	$ 2,143