Summary of Significant Accounting Policies - Warranty Accrual (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning of period	$ 1,038	$ 1,062	$ 864	$ 1,015
Provision to product cost of revenue	77	60	251	89
Charges	(1)	(79)	(1)	(61)
End of period	1,114	1,043	1,114	1,043
Product warranty accrual	1,038	1,062	864	1,015
Orion Engineered Systems
Movement in Standard Product Warranty Accrual [Roll Forward]
End of period	310	310	310	310
Product warranty accrual	$ 310	$ 310	$ 310	$ 310