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Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Statement Of Other Comprehensive Income [Abstract]
Net income	$ 22,230,292	$ 16,805,184	$ 10,864,561
Other comprehensive income, net of tax
Reclassification adjustment for loss on interest rate swaps, net of tax of $110,452 and $358,384 for 2011 and 2010, respectively		178,090	577,829
Comprehensive income	$ 22,230,292	$ 16,983,274	$ 11,442,390

X

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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Net of tax amount of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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