Interest Rate Swap Agreements (Tables)

6 Months Ended

Sep. 30, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of notional amounts of interest rate swaps

	Six months ended September 30,
	2013		2012
Notional amounts at April 1	$	50,000,000	$	—
New contracts		—		50,000,000
Matured contracts		—		—
Notional amounts at September 30	$	50,000,000	$	50,000,000

Schedule of interest rate swap agreements effective date

Date Entered	Effective Date	Notional Amount		Fixed Rate Of Interest			Maturity Date
June 1, 2012	June 13, 2012	$	25,000,000		1.00	%	June 13, 2017
July 30, 2012	August 13, 2012	$	25,000,000		0.87	%	August 14, 2017

Schedule of locations and amounts of losses recognized in income

	Three months ended September 30,				Six months ended September 30,
	2013		2012		2013			2012
Periodic change in fair value of interest rate swap agreements	$	249,616	$	474,019	$	(583,643	)	$	683,120
Periodic settlement differentials included in interest expense		95,725		77,606		189,039			93,424
Total	$	345,341	$	551,625	$	(394,604	)	$	776,544

Schedule of average variable rates received and average fixed rates paid under the swap agreements

	Three months ended September 30,						Six months ended September 30,
	2013			2012			2013			2012
Variable rate received		0.19	%		0.24	%		0.19	%		0.24	%
Fixed rate paid		0.94	%		0.95	%		0.94	%		0.96	%