Employee Benefit and Stock Compensation Plans Net Periodic Pension Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Interest Cost	$ 0	$ 61	$ 106
Periodic Pension Benefit Unrecognized loss	0	34	45
Defined Benefit Plan, Settlements, Benefit Obligation	0	1,180	100
Defined Benefit Plan, Expected Return on Plan Assets	0	(106)	(176)
Defined Benefit Plan, Net Periodic Benefit Cost	$ 0	$ 1,169	$ 75