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, 2009	$ 6,576	$ 4,370	$ 97,816	$ (1,764)	$ 106,998
Issuance of common stock:
Stock options exercised, net	70	274			344
Unrealized gain on available for sale investments, net of tax				39	39
Long-term incentive compensation		510			510
Stock-based compensation		271			271
Interest rate swaps valuation adjustment, net of tax				177	177
Minimum pension liability adjustment, net of tax				(204)	(204)
Cash dividends declared			(1,324)		(1,324)
Net income			10,801		10,801
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
Interest rate swaps valuation adjustment, net of tax
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