Condensed Consolidated Statement of Shareowners' Equity (unaudited) Statement - USD ($) $ in Thousands	Total	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	AOCI Attributable to Parent	Treasury Stock
Shareowners’ Equity at Jun. 30, 2017	$ 176,204	$ 14	$ 2,137	$ 2,971	$ 230,763	$ 1,115	$ (60,796)
Net income	18,335				18,335
Other Comprehensive Income (Loss), Net of Tax	212					212
Issuance of non-restricted stock (9,000 shares in Q2'19, 9,000 shares in Q2'18, 21,000 shares YTD in FY'19, 19,000 shares YTD in FY'18)	1			(372)			373
Conversion of Class A to Class B common stock (7,000 shares in Q2'19, 1,000 shares in Q2'18, 7,000 shares YTD in FY'19, 1,000 shares YTD in FY'18)	0	0	0
Compensation expense related to stock incentive plans	2,511			2,511
Performance share issuance (0 shares in Q2'19, 0 shares in Q2'18, 81,000 shares YTD in FY19, 226,000 shares YTD in FY'18)	(2,101)			(2,261)	(4,462)		4,622
Relative total shareholder return performance units issuance (0 shares in Q2'19, 0 shares in Q2'18, 27,000 shares YTD in FY'19, 38,000 shares YTD in FY'18)	(326)			(1,283)			957
Repurchase of Common Stock (371,000 shares in Q2'19, 2,000 shares in Q2'18, 567,000 shares YTD in FY'19, 107,000 YTD in FY'18)	(1,781)						(1,781)
Dividends declared ($0.08 per share in Q2'19, $0.07 per share in Q2'18, $0.16 per share YTD in FY'19, $0.14 per share YTD in FY'18)	(5,282)				(5,282)
Shareowners’ Equity at Dec. 31, 2017	187,773	14	2,137	1,566	239,354	1,327	(56,625)
Shareowners’ Equity at Sep. 30, 2017	182,015	14	2,137	712	234,616	1,246	(56,710)
Net income	7,378				7,378
Other Comprehensive Income (Loss), Net of Tax	81					81
Issuance of non-restricted stock (9,000 shares in Q2'19, 9,000 shares in Q2'18, 21,000 shares YTD in FY'19, 19,000 shares YTD in FY'18)	(1)			(121)			120
Conversion of Class A to Class B common stock (7,000 shares in Q2'19, 1,000 shares in Q2'18, 7,000 shares YTD in FY'19, 1,000 shares YTD in FY'18)	0	0	0
Compensation expense related to stock incentive plans	975			975
Performance share issuance (0 shares in Q2'19, 0 shares in Q2'18, 81,000 shares YTD in FY19, 226,000 shares YTD in FY'18)	1				1
Repurchase of Common Stock (371,000 shares in Q2'19, 2,000 shares in Q2'18, 567,000 shares YTD in FY'19, 107,000 YTD in FY'18)	(35)						(35)
Dividends declared ($0.08 per share in Q2'19, $0.07 per share in Q2'18, $0.16 per share YTD in FY'19, $0.14 per share YTD in FY'18)	(2,641)				(2,641)
Shareowners’ Equity at Dec. 31, 2017	187,773	14	2,137	1,566	239,354	1,327	(56,625)
Shareowners’ Equity at Jun. 30, 2018	193,024	13	2,138	1,881	249,945	1,816	(62,769)
Net income	20,281				20,281
Other Comprehensive Income (Loss), Net of Tax	45					45
Issuance of non-restricted stock (9,000 shares in Q2'19, 9,000 shares in Q2'18, 21,000 shares YTD in FY'19, 19,000 shares YTD in FY'18)	(12)			(288)			276
Conversion of Class A to Class B common stock (7,000 shares in Q2'19, 1,000 shares in Q2'18, 7,000 shares YTD in FY'19, 1,000 shares YTD in FY'18)	0	0	0
Compensation expense related to stock incentive plans	3,628			3,628
Performance share issuance (0 shares in Q2'19, 0 shares in Q2'18, 81,000 shares YTD in FY19, 226,000 shares YTD in FY'18)	(652)			(1,709)			1,057
Restricted share units issuance (15,000 shares in Q2'19, 0 shares in Q2'18, 15,000 shares YTD in FY'19, 0 shares YTD in FY'18)	(181)			(382)			201
Relative total shareholder return performance units issuance (0 shares in Q2'19, 0 shares in Q2'18, 27,000 shares YTD in FY'19, 38,000 shares YTD in FY'18)	(173)			(523)			350
Repurchase of Common Stock (371,000 shares in Q2'19, 2,000 shares in Q2'18, 567,000 shares YTD in FY'19, 107,000 YTD in FY'18)	(9,130)						(9,130)
Dividends declared ($0.08 per share in Q2'19, $0.07 per share in Q2'18, $0.16 per share YTD in FY'19, $0.14 per share YTD in FY'18)	(5,959)				(5,959)
Shareowners’ Equity at Dec. 31, 2018	200,871	13	2,138	2,607	264,267	1,861	(70,015)
Shareowners’ Equity at Sep. 30, 2018	198,684	13	2,138	1,431	257,825	1,788	(64,511)
Net income	9,405				9,405
Other Comprehensive Income (Loss), Net of Tax	73					73
Issuance of non-restricted stock (9,000 shares in Q2'19, 9,000 shares in Q2'18, 21,000 shares YTD in FY'19, 19,000 shares YTD in FY'18)	0			(125)			125
Conversion of Class A to Class B common stock (7,000 shares in Q2'19, 1,000 shares in Q2'18, 7,000 shares YTD in FY'19, 1,000 shares YTD in FY'18)	0	0	0
Compensation expense related to stock incentive plans	1,683			1,683
Restricted share units issuance (15,000 shares in Q2'19, 0 shares in Q2'18, 15,000 shares YTD in FY'19, 0 shares YTD in FY'18)	(181)			(382)			201
Repurchase of Common Stock (371,000 shares in Q2'19, 2,000 shares in Q2'18, 567,000 shares YTD in FY'19, 107,000 YTD in FY'18)	(5,830)						(5,830)
Dividends declared ($0.08 per share in Q2'19, $0.07 per share in Q2'18, $0.16 per share YTD in FY'19, $0.14 per share YTD in FY'18)	(2,963)				(2,963)
Shareowners’ Equity at Dec. 31, 2018	$ 200,871	$ 13	$ 2,138	$ 2,607	$ 264,267	$ 1,861	$ (70,015)