Consolidated Balance Sheets (Parenthetical)	Mar. 31, 2012	Jun. 30, 2011
Consolidated Balance Sheets [Abstract]
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	54,799,262	54,730,291
Common stock, shares outstanding	52,347,016	44,107,380
Common stock in treasury, shares	2,452,246	10,622,911