Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Cost basis	$ 12,795
AOCI unrealized holding gain	316	[1]
Fair value	13,111
Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost basis	8,679	[2]
AOCI unrealized holding gain	187	[1],[2]
Fair value	8,866	[2]
Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost basis	4,116
AOCI unrealized holding gain	129	[1]
Fair value	$ 4,245

[1] Accumulated Other Comprehensive Income

[2] Various maturity dates from February 2014 - January 2017.