Condensed Consolidated Balance Sheets Parentheticals (USD $)	Sep. 30, 2011	Mar. 31, 2011
Condensed Consolidated Balance Sheets
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares outstanding	36,160,047	36,311,143
Treasury stock, shares	1,291,325	1,291,325