CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands, shares in Millions	Mar. 31, 2016	Mar. 31, 2015
CONSOLIDATED BALANCE SHEETS
Software, accumulated amortization (in dollars)	$ 286,387	$ 258,185
Purchased software licenses, accumulated amortization (in dollars)	$ 98,222	$ 89,955
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, authorized shares	200.0	200.0
Common stock, issued shares	130.4	127.9
Treasury stock, shares	53.0	50.1