Condensed Consolidated Balance Sheet Parenthetical (USD $)	Dec. 31, 2011	Mar. 31, 2011
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	225,000,000	225,000,000
Common stock, shares issued	68,382,984	68,300,482
Common stock, shares outstanding	68,382,984	68,300,482
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000