Incentive Compensation Plans and Retirement Plans (Restricted Stock Units) (Details) - Restricted stock units [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock-based Compensation, Nonvested, Shares (in 000's) [Roll Forward]
March 31, 2016	276
Granted	309
Vested	(183)
Forfeited	(61)
March 31, 2017	341	276
Stock-based Compensation, Nonvested, Weighted Average Grant Date Fair Value (Per Share) [Roll Forward]
March 31, 2016	$ 19.99
Granted	11.97
Vested	18.27
Forfeited	17.32
March 31, 2017	$ 14.11	$ 19.99
Total fair value of shares vested	$ 2,163	$ 3,167	$ 3,842
Total unrecognized pre-tax stock-based compensation expense related to non-vested shares	$ 2,565
Weighted-average period of recognition	1 year 11 months