Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Property, Plant and Equipment [Line Items]
Depreciation	$ 33,400	$ 33,400	$ 31,200
Property, Plant and Equipment, Gross	451,432	442,493
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(234,577)	(213,883)
Property, plant, and equipment, net	216,855	228,610
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	22,445	22,360
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	152,191	139,627
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	234,071	228,246
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	25,316	25,593
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,432	2,998
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 13,977	$ 23,669