Pension and Postretirement Benefits Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Pension and Other Postretirement Benefit Expense [Abstract]
Curtailment loss	$ 1,062	$ 0	$ 1,062	$ 0
Reduction in the benefit obligation and accumulated other comprehensive income	$ 2,534