Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Property, Plant and Equipment [Line Items]
Depreciation	$ 33,400	$ 31,200	$ 28,100
Property, Plant and Equipment, Gross	442,493	416,701
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(213,883)	(190,368)
Property, plant, and equipment, net	228,610	226,333	$ 196,583
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	22,360	21,265
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	139,627	141,370
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	228,246	215,796
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	25,593	22,237
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,998	3,206
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 23,669	$ 12,827