Condensed Consolidated Statements of Stockholders' Equity (unaudited) (USD $) In Thousands	Common Class A [Member]	Common Class B [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Jun. 30, 2011	$ 5,933	$ 801	$ 51,411	$ 96,477	$ (1,961)	$ 152,661
Net earnings (loss)				5,534		5,534
Other comprehensive loss					(8,802)	(8,802)
Dividends ($0.30 per share)				(2,027)		(2,027)
Issuance of stock under ESOP	23		223			246
Issuance of stock under ESPP		9	72			81
Stock-based compensation			121			121
Conversion	51	(51)
Balance at Mar. 31, 2012	6,007	759	51,827	99,984	(10,763)	147,814
Balance at Jun. 30, 2012	6,017	753	51,941	94,661	(25,534)	127,838
Translation loss					(16,350)
Pension and postretirement plans net of taxes					(9,661)
					(26,011)	(26,011)
Net earnings (loss)				(1,360)		(1,360)
Other comprehensive loss					(477)	(477)
Dividends ($0.30 per share)				(2,040)		(2,040)
Purchase of stock	(5)		(57)			(62)
Issuance of stock under ESOP	21		220			241
Issuance of stock under ESPP		20	141			161
Stock-based compensation			141			141
Conversion	31	(31)
Balance at Mar. 31, 2013	$ 6,064	$ 742	$ 52,386	$ 91,261	$ (26,011)	$ 124,442