Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Cash Flows From Operating Activities:
Net Income	$ 49,354,707	$ 47,222,557
Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities:
Provision For Doubtful Accounts	(28,980)	472,560
Amortization and Depreciation	31,985,669	21,072,577
Deferred Income Tax Expense	2,962,278	2,544,663
Net Loss (Gain) On Insurance Settlement or On Sale of Property, Plant & Equipment	(8,255,844)	(5,794,623)
Amortization of Deferred Borrowing Costs	1,042,945	213,152
Share Based Compensation Expense	2,988,596	2,816,827
Effects of Changes In Assets & Liabilities:
Accounts Receivable	30,308,868	(8,318,577)
Inventories	(4,328,441)	(6,684,028)
Prepaid Expenses and Other	(404,189)	(1,058,221)
Other Assets	(4,157,077)	98,629
Net Change In Billings Related To Costs and Estimated Earnings On Uncompleted Contracts	(4,022,948)	2,031,912
Accounts Payable	(2,053,323)	2,459,582
Other Accrued Liabilities and Income Taxes Payable	(777,868)	9,509,647
Net Cash Provided By Operating Activities	94,614,393	66,586,657
Cash Flows Used For Investing Activities:
Proceeds From Sale Or Insurance Settlement of Property, Plant, and Equipment	910,180	8,658,020
Purchase of Property, Plant and Equipment	(34,948,472)	(19,628,014)
Acquisition of Subsidiaries, Net of Cash Acquired	(275,702,030)	(122,632,180)
Net Cash From Investing Activities	(309,740,322)	(133,602,174)
Cash Flows From Financing Activities:
Proceeds from Stock Options Exercised	0	15,781
Excess Tax Benefits From Stock Options and Stock Appreciation Rights	1,216,428	1,283,240
Proceeds from Revolving Loan	197,000,000	0
Payments on Revolving Loan	(30,000,000)	0
Proceeds on Long Term Debt	75,000,000	0
Payments on Long Term Debt	(16,160,714)	(18,135,866)
Debt Acquisition Costs	(5,880,539)	(100,000)
Payments of Dividends	(10,709,629)	(9,870,423)
Net Cash Used In Financing Activities	210,465,546	(26,807,268)
Effect of Exchange Rate Changes on Cash	9,881	25,939
Net Increase (Decrease) In Cash & Cash Equivalents	(4,650,502)	(93,796,846)
Cash & Cash Equivalents At Beginning of Period	55,597,751	143,302,666
Cash & Cash Equivalents At End of Period	50,947,249	49,505,820
Supplemental Disclosures
Cash Paid For Interest	11,667,987	9,567,067
Cash Paid For Income Taxes	$ 20,537,607	$ 23,870,187