Summary of Significant Accounting Policies - Warranty Accrual (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Product Warranty Liability [Line Items]
Product warranty accrual	$ 864	$ 1,015
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning of period	864	1,015
Provision to product cost of revenue	175	29
Charges	(1)	18
End of period	1,038	1,062
Orion Engineered Systems
Product Warranty Liability [Line Items]
Product warranty accrual	310	310
Movement in Standard Product Warranty Accrual [Roll Forward]
End of period	$ 310	$ 310