Stock-Based Compensation Incentive Plans (Details)	12 Months Ended
	Mar. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan, maximum shares authorized (in shares)	1,109,000
Incentive plan, shares available for grant reduction (in shares)	140,000
incentive plan, shares available for future awards (in shares)	828,000
Incentive plan, awards outstanding (in shares)	660,000
2016 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan, maximum shares authorized (in shares)	900,000
Incentive plan, shares granted (in shares)	142,000
Incentive plan, shares cancelled (in shares)	2,000
Incentive plan, shares vested (in shares)	22
incentive plan, shares available for future awards (in shares)	620,000
Incentive plan, awards outstanding (in shares)	118,000
2007 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan, maximum shares authorized (in shares)	209,000
incentive plan, shares available for future awards (in shares)	209,000
Incentive plan, awards outstanding (in shares)	542,000