Marketable Securities (Marketable Securities Treated as Available-for-Sale Securities) (Details) (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010
Total available-for-sale securities, amortized cost	$ 26,048	$ 29,596
Total available-for-sale securities, gross unrealized gains	195	65
Total available-for-sale securities, gross unrealized losses	0	0
Total available-for-sale securities, fair value	26,243	29,661
Common Stock [Member]
Total available-for-sale securities, amortized cost	198
Total available-for-sale securities, gross unrealized gains	146
Total available-for-sale securities, gross unrealized losses	0
Total available-for-sale securities, fair value	344
State and Municipal Bonds [Member]
Total available-for-sale securities, amortized cost		5,197
Total available-for-sale securities, gross unrealized gains		0
Total available-for-sale securities, gross unrealized losses		0
Total available-for-sale securities, fair value		5,197
Government and Agency Securities [Member]
Total available-for-sale securities, amortized cost	25,850	24,399
Total available-for-sale securities, gross unrealized gains	49	65
Total available-for-sale securities, gross unrealized losses	0	0
Total available-for-sale securities, fair value	$ 25,899	$ 24,464