Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Jun. 30, 2011
Condensed Consolidated Balance Sheets [Abstract]
Held-to-maturity securities, fair value current	$ 1,080	$ 357
Held-to-maturity securities, fair value non-current	537	1,651
Other investments, cost	13,442	8,360
Property plant and equipment, accumulated depreciation	$ 4,012	$ 3,282
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	24,409,726	23,944,660
Common stock, shares outstanding	23,552,221	23,364,644
Treasury stock, shares	857,505	580,016