Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Property, Plant and Equipment [Line Items]
Depreciation	$ 33,200	$ 33,400	$ 33,400
Property, Plant and Equipment, Gross	467,618	451,432
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(257,391)	(234,577)
Property, plant, and equipment, net	210,227	216,855
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	21,677	22,445
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	156,447	152,191
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	245,588	234,071
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	27,075	25,316
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,766	3,432
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 13,065	$ 13,977