Derivatives (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended		3 Months Ended	12 Months Ended			12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Series F Preferred Stock [Member]	Dec. 31, 2011 Series F Preferred Stock [Member]	Dec. 31, 2010 Series F Preferred Stock [Member]	Oct. 31, 2008 Series F Preferred Stock [Member]	Dec. 31, 2010 Land Development [Member]	Aug. 31, 2010 Land Development [Member] Mark-to-Market on Interest Rate Protection Agreements (OCI) [Member]	Dec. 31, 2010 Land Development [Member] Mark-to-Market on Interest Rate Protection Agreements (OCI) [Member]
Derivatives (Textual) [Abstract]
Minimum fixed coupon rate of preferred stock			2.375%	2.375%
Number of years of U.S treasury rate one			30 years	30 years
Number of years of U.S treasury rate two			10 years	10 years
LIBOR rate			3-month LIBOR Rate	3-month LIBOR Rate
New coupon rate of preferred stock			5.365%	5.365%
Notional value of interest rate swap agreement						$ 50,000
Treasury Rate				5.2175%
Outstanding payable due on Series F Agreement			280	280	194
Mark-to-Market on Interest Rate Protection Agreements, unrealized gain							1,137
Percentage of unrealized gain									10.00%
Mark-to-Market on Interest Rate Protection Agreements, income tax provision							414
Write off of interest rate protection agreements								1,625
Percentage of unrealized loss related to interest rate protection agreements								10.00%
Settlements payments of market to market gains or losses				574	492
Amortization Reclassified from OCI into Income				2,255
Derivatives (Additional Textual) [Abstract]
Unrealized market to market loss on interest rate protection agreement	$ 1,718	$ 1,107
Number of years of Long dated Treasuries	30 years