Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Feb. 28, 2017	Feb. 29, 2016
Deferred tax assets
Allowance for doubtful receivables	$ 512	$ 778
Inventories	1,124	987
Employee compensation and benefits	1,448	1,304
Pension and noncurrent employee compensation benefits	5,786	7,037
Net operating loss and foreign tax credits	438	3,480
Stock options	552	788
Total deferred tax assets	9,860	14,374
Deferred tax liabilities
Property, plant and equipment	6,979	6,719
Goodwill and other intangible assets	9,371	7,519
Property tax	440	503
Valuation allowance		1,053
Other	23	116
Total deferred tax liabilities	16,813	15,910
Net deferred income tax liabilities	$ 6,953	$ 1,536