CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	180,000,000	180,000,000
Common stock, issued shares	32,318,295	33,142,408
Common stock, outstanding shares	32,318,295	33,142,408
Common stock in treasury, shares	9,237,154	8,413,041