Restructuring Costs (Cumulative Restructuring Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1,725	$ 4,890	$ 6,746
Restructuring and impairment costs	2,389	4,890	6,746
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	1,629	4,354	3,743
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other restructuring costs	96	536	3,003
Farmer loans and property and equipment	$ 664	$ 0	$ 0