Stock-Based Compensation Incentive Plans (Details) - shares	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan, awards outstanding (in shares)	683,000
2007 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan, maximum shares authorized (in shares)	1,390,000
Incentive plan, shares available for grant reduction (in shares)	288,000
Incentive plan, shares that do not affect grant reduction (in shares)	85,000
Incentive plan, shares granted (in shares)	1,903,000
Incentive plan, shares cancelled (in shares)	886,000
Incentive plan, shares vested (in shares)	342,000
incentive plan, shares available for future awards (in shares)		171,000
Incentive plan, awards outstanding (in shares)	674,000
Other Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan, awards outstanding (in shares)	8,000