Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Common Class A [Member] The 1984 ESOP [Member]	Common Class A [Member] Long-Term Incentive Plan [Member]	Common Class A [Member]	Common Class B [Member] The 2013 ESOP [Member]	Common Class B [Member]	Additional Paid-in Capital [Member] The 1984 ESOP [Member]	Additional Paid-in Capital [Member] The 2013 ESOP [Member]	Additional Paid-in Capital [Member] Long-Term Incentive Plan [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	The 1984 ESOP [Member]	The 2013 ESOP [Member]	Long-Term Incentive Plan [Member]	Total
Balance at Jun. 30, 2011			$ 5,933		$ 801				$ 51,411	$ 96,477	$ (1,961)				$ 152,661
Total comprehensive income										888	(23,573)				(22,685)
Dividends										(2,704)					(2,704)
Issuance of stock under ESOP	24					255						279
Issuance of stock under ESPP					9				72						81
Issuance of stock for length of service awards			3						32						35
Stock-based compensation									171						171
Conversion of common stock			57		(57)
Balance at Jun. 30, 2012			6,017		753				51,941	94,661	(25,534)				127,838
															(24,476)
Total comprehensive income										(162)	1,058				896
Dividends										(2,721)					(2,721)
Repurchase of shares			(5)						(57)						(62)
Issuance of stock under ESOP	25					253						278
Issuance of stock under ESPP					34				248						282
Issuance of stock for length of service awards			3						30						33
Stock-based compensation									198						198
Conversion of common stock			37		(37)
Balance at Jun. 30, 2013			6,077		750				52,613	91,778	(24,476)				126,742
Translation loss, net											(18,312)
Pension and postretirement plans, net of taxes											(2,113)
											(20,425)				(20,425)
Total comprehensive income										6,712	4,051				10,763
Dividends										(2,775)					(2,775)
Issuance of stock under ESOP			22	77			726		250				803		272
Issuance of stock under Long Term Incentive Plan		3						35						38
Issuance of stock under ESPP					27				231						258
Issuance of stock for length of service awards			5						54						59
Stock-based compensation									154						154
Conversion of common stock			59		(59)
Balance at Jun. 30, 2014			$ 6,166		$ 795				$ 54,063	$ 95,715	$ (20,425)				$ 136,314