Restructuring Plan - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Restructuring Cost And Reserve [Line Items]
Restructuring costs	$ 130	$ 231	$ 130	$ 4,685	$ 7,078
Restructuring and Related Cost, Expected Cost	$ 1,363		$ 1,363
Minimum [Member]
Restructuring Cost And Reserve [Line Items]
Contractual lease expiration date			Jan. 31, 2018
Maximum [Member]
Restructuring Cost And Reserve [Line Items]
Contractual lease expiration date			Sep. 30, 2023