Marketable Securities (Fair Value Hierarchy of Assets Measured on a Recurring Basis) (Details) (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010
Total available-for-sale securities	$ 26,243	$ 29,661
Common Stock [Member]
Total available-for-sale securities	344
Common Stock [Member] | Level 1 - Quoted Prices in Active Markets for Identical Assets [Member]
Total available-for-sale securities	344
Common Stock [Member] | Level 2 - Significant Other Observable Inputs [Member]
Total available-for-sale securities	0
Common Stock [Member] | Level 3 - Significant Unobservable Inputs[Member]
Total available-for-sale securities	0
State and Municipal Bonds [Member]
Total available-for-sale securities		5,197
State and Municipal Bonds [Member] | Level 1 - Quoted Prices in Active Markets for Identical Assets [Member]
Total available-for-sale securities		0
State and Municipal Bonds [Member] | Level 2 - Significant Other Observable Inputs [Member]
Total available-for-sale securities		5,197
State and Municipal Bonds [Member] | Level 3 - Significant Unobservable Inputs[Member]
Total available-for-sale securities		0
Government and Agency Securities [Member]
Total available-for-sale securities	25,899	24,464
Government and Agency Securities [Member] | Level 1 - Quoted Prices in Active Markets for Identical Assets [Member]
Total available-for-sale securities	25,899	24,464
Government and Agency Securities [Member] | Level 2 - Significant Other Observable Inputs [Member]
Total available-for-sale securities	0	0
Government and Agency Securities [Member] | Level 3 - Significant Unobservable Inputs[Member]
Total available-for-sale securities	0	0
Level 1 - Quoted Prices in Active Markets for Identical Assets [Member]
Total available-for-sale securities	26,243	24,464
Level 2 - Significant Other Observable Inputs [Member]
Total available-for-sale securities	0	5,197
Level 3 - Significant Unobservable Inputs[Member]
Total available-for-sale securities	$ 0	$ 0