Restatement of Previously Issued Financial Statements - Income Statement (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Sales	$ 208,158	$ 228,116	$ 609,770	$ 679,272
Cost of Sales	177,041	176,819	487,471	520,742
Gross Profit	31,117	51,297	122,299	158,530
Operating Income	1,554	26,215	38,964	77,632
Income Before Income Taxes	(1,968)	23,377	28,607	67,396
Income Tax Expense	(1,802)	6,731	6,925	18,402
Net Income	$ (166)	$ 16,646	$ 21,682	$ 48,994
Basic Earnings Per Share (usd per share)	$ (0.01)	$ 0.64	$ 0.83	$ 1.89
Diluted Earnings Per Share (usd per share)	$ (0.01)	$ 0.64	$ 0.83	$ 1.88
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Sales		$ 227,459		$ 665,171
Cost of Sales		173,593		506,091
Gross Profit		53,866		159,080
Operating Income		28,784		78,182
Income Before Income Taxes		25,946		67,946
Income Tax Expense		7,695		18,609
Net Income		$ 18,251		$ 49,337
Basic Earnings Per Share (usd per share)		$ 0.70		$ 1.90
Diluted Earnings Per Share (usd per share)		$ 0.70		$ 1.89
Correction
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Sales		$ 657		$ 14,101
Cost of Sales		3,226		14,651
Gross Profit		(2,569)		(550)
Operating Income		(2,569)		(550)
Income Before Income Taxes		(2,569)		(550)
Income Tax Expense		(964)		(207)
Net Income		$ (1,605)		$ (343)
Basic Earnings Per Share (usd per share)		$ (0.06)		$ (0.01)
Diluted Earnings Per Share (usd per share)		$ (0.06)		$ (0.01)