Interest Rate Swap Agreements (Tables)

12 Months Ended

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	%