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Interest Rate Swap Agreements - Summary of locations and amounts of gains (losses) in income (Details 2) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Periodic change in fair value of interest rate swap agreements	$ (833,259)	$ 209,101
Periodic settlement differentials included in interest expense	93,314	15,818
Total	$ (739,945)	$ 224,919

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Amount of periodic settlement differentials included in interest expense.

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Amount of pre tax losses recognized in income.

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- Definition

Amount of unrealized gain (loss) included in earnings related to the fair value of the hedged item in an interest rate fair value hedge, offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

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