Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2020	Mar. 31, 2019
Consolidated Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	450,000,000	450,000,000
Common stock, shares issued	59,083,290	58,882,515
Common stock, shares outstanding (net of treasury stock)	50,827,952	55,167,708
Treasury stock, shares at cost	8,255,338	3,714,807