Interest Rate Swaps (Narrative) (Details) (USD $)	12 Months Ended					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Jun. 23, 2008	Mar. 19, 2008	Dec. 31, 2012 Interest Rate Swap [Member]	Dec. 31, 2011 Interest Rate Swap [Member]	Mar. 31, 2011 RX0583-T1 [Member]	Jun. 30, 2011 RX0583-T2 [Member]	Mar. 31, 2011 RX0584-T1 [Member]	Mar. 31, 2011 $6.0 Million Of Variable-Rate Debt Through March 2011 [Member]	Mar. 31, 2013 $33.0 Million Of Variable-Rate Debt Through March 2013 [Member]	Jun. 30, 2011 $3.0 Million Of Variable-Rate Debt Through June 2011 [Member]	Jun. 30, 2013 $3.0 Million Of Variable-Rate Debt Through June 2013 [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]
Derivative [Line Items]
Aggregate indebtedness				$ 6,000,000	$ 39,000,000
Debt, variable-rate	46,607,385	43,508,054									6,000,000	33,000,000	3,000,000	3,000,000
Swap amount matured			5,000,000					1,000,000	3,000,000	4,000,000
Libor margin rate															2.25%	2.00%
Unrealized Gain (Loss) on Derivatives						560,754	528,623
Fair value loss on swaps						303,851	1,243,183
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	634,921	885,939				179,313	740,067
Tax benefit						$ 124,538	$ 503,116