Derivative Financial Instruments (Narrative) (Details) (USD $)		0 Months Ended		0 Months Ended
	Sep. 30, 2013	Feb. 06, 2009 Credit Facility [Member] Interest rate swap agreements [Member]	Mar. 03, 2008 Loans [Member] Interest rate swap agreements [Member]	Oct. 04, 2011 Bank Of America [Member] Interest rate swap agreements [Member]	Oct. 04, 2011 Union Bank [Member] Interest rate swap agreements [Member]	Aug. 09, 2013 Swap [Member]	Sep. 30, 2013 Swap [Member]	Aug. 09, 2013 LIBOR [Member] Swap [Member]
Derivative Financial Instruments [Line Items]
Term of swap agreement						3 years
Notional amount	$ 80,000,000
Basis spread on variable rate								1.20%
Swap agreement collateral							40,000,000
Secured notes		120,000,000	18,000,000
Fixed rate		1.93%	4.25%
Maturity date of senior notes		January 3, 2012
Loan maximum borrowing capacity				$ 18,000,000	$ 20,000,000
Floating rate, LIBOR plus basis points (as a percentage)				0.50%	0.40%
Loan mature date				Mar. 01, 2013	Jan. 02, 2015