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Interest Rate Swap Agreements (Tables) | 12 Months Ended
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Mar. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of notional amounts of interest rate swaps |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Notional amounts at beginning of year |  | $ | — |  |  | $ | — |  |  | $ | 50,000,000 |
New contracts |  |  | 50,000,000 |  |  |  | — |  |  |  | — |
Matured contracts |  |  | — |  |  |  | — |  |  |  | (50,000,000 | )
Notional amounts at end of year |  | $ | 50,000,000 |  |  | $ | — |  |  | $ | — |
Schedule of locations and amounts of losses recognized in income |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Periodic change in fair value of interest rate swaps |  | $ | (504,852 | ) |  | $ | — |  |  | $ | 783,678 |
Losses reclassified from accumulated other comprehensive loss |  |  | — |  |  |  | — |  |  |  | (288,542 | )
|  |  | (504,852 | ) |  |  | — |  |  |  | 495,136 |
Periodic settlement differentials included in interest expense |  |  | (277,364 | ) |  |  | — |  |  |  | (801,048 | )
Loss recognized in income |  | $ | (782,216 | ) |  | $ | — |  |  | $ | (305,912 | )
Schedule of average variable rates received and average fixed rates paid under the swap agreements |
|  | 2013 |  |  | 2012 |
Average variable rate received |  |  | 0.22 | % |  |  | 0.00 | %
Average fixed rate paid |  |  | 0.94 | % |  |  | 0.00 | %

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- Definition Tabular disclosure of average variable rates received and average fixed rates paid under swap agreements. + References No definition available. + Details
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- Definition Tabular disclosure of derivative instruments (including nonderivative instruments that are designated and qualify as hedging instruments) of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 + Details
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