Restructuring Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2016
Restructuring Costs [Abstract]
Restructuring expense	$ 0	$ 701	$ 0	$ 4,454	$ 7,078
Restructuring and Related Cost, Expected Cost	$ 1,579		$ 1,579