Net Income Per Share (Options and Rights Excluded) (Details) In Thousands, unless otherwise specified	3 Months Ended
Jun. 30, 2013	Jun. 30, 2012
Anti-dilutive shares	937	777
Employee stock options
Anti-dilutive shares	935	774
Stock purchase rights
Anti-dilutive shares	2	3

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References+ Details