Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total Par Value Of Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Jun. 30, 2010	$ 6,646	$ 5,425	$ 107,293	$ (1,752)	$ 117,612
Issuance of common stock:
Stock options exercised, net	65	259			324
Unrealized gain on available for sale investments, net of tax				348	348
Long-term incentive compensation		590			590
Stock-based compensation		424			424
Minimum pension liability adjustment, net of tax				869	869
Cash dividends declared			(2,011)		(2,011)
Net income			10,417		10,417
Balance at Jun. 30, 2011	6,711	6,698	115,699	(535)	128,573
Issuance of common stock:
Stock options exercised, net	156	761			917
Unrealized gain on available for sale investments, net of tax				(3)	(3)
Long-term incentive compensation	39	761			800
Stock-based compensation		256			256
Minimum pension liability adjustment, net of tax				(1,101)	(1,101)
Cash dividends declared			(3,068)		(3,068)
Net income			13,068		13,068
Balance at Jun. 30, 2012	6,906	8,476	125,699	(1,639)	139,442
Issuance of common stock:
Stock options exercised, net	92	1,197			1,289
Unrealized gain on available for sale investments, net of tax				60	60
Long-term incentive compensation	109	442			551
Stock-based compensation		500			500
Minimum pension liability adjustment, net of tax				488	488
Cash dividends declared			(4,244)		(4,244)
Net income			13,151		13,151
Balance at Jun. 30, 2013	$ 7,107	$ 10,615	$ 134,606	$ (1,091)	$ 151,237