Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Nov. 30, 2012	Nov. 30, 2011
Cash Flows From Operating Activities:
Net Income	$ 47,222,557	$ 29,092,140
Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities:
Provision For Doubtful Accounts	472,560	129,338
Amortization and Depreciation	21,072,577	16,869,925
Deferred Income Tax Expense	2,544,663	3,491,732
Net Loss (Gain) On Insurance Settlement or On Sale of Property, Plant & Equipment	(5,794,623)	163,777
Amortization of Deferred Borrowing Costs	213,152	241,006
Share Based Compensation Expense	2,816,827	2,696,083
Effects of Changes In Assets & Liabilities:
Accounts Receivable	(8,318,577)	(3,693,162)
Inventories	(6,684,028)	(5,273,206)
Prepaid Expenses and Other	(1,058,221)	(1,153,152)
Other Assets	98,629	(3,808)
Net Change In Billings Related To Costs and Estimated Earnings On Uncompleted Contracts	2,031,912	2,176,709
Accounts Payable	2,459,582	2,604,300
Other Accrued Liabilities and Income Taxes Payable	9,509,647	(510,062)
Net Cash Provided By Operating Activities	66,586,657	46,831,620
Cash Flows Used For Investing Activities:
Proceeds From Sale Or Insurance Settlement of Property, Plant, and Equipment	8,658,020	273,521
Purchase of Property, Plant and Equipment	(19,628,014)	(16,344,083)
Acquisition of Subsidiaries, Net of Cash Acquired	(122,632,180)	0
Net Cash From Investing Activities	(133,602,174)	(16,070,562)
Cash Flows From Financing Activities:
Proceeds From Exercise of Stock Options	15,781	48
Excess Tax Benefits From Stock Options and Stock Appreciation Rights	1,283,240	199,427
Payments of Debt Financing Costs	(100,000)	0
Payments on Long Term Debt	(18,135,866)
Payments of Dividends	(9,870,423)	(9,420,167)
Net Cash Used In Financing Activities	(26,807,268)	(9,220,692)
Effect of Exchange Rate Changes on Cash	25,939	168,350
Net Increase (Decrease) In Cash & Cash Equivalents	(93,796,846)	21,708,716
Cash & Cash Equivalents At Beginning of Period	143,302,666	138,389,837
Cash & Cash Equivalents At End of Period	49,505,820	160,098,553
Supplemental Disclosures
Cash Paid For Interest	9,567,067	10,041,387
Cash Paid For Income Taxes	$ 23,870,187	$ 16,636,076