Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Mar. 31, 2014
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	53,151,889	53,126,866
Common stock, shares outstanding	20,880,969	20,979,392
Treasury stock, shares	32,270,920	32,147,474