Mortgages and Notes Payable (Tables)

3 Months Ended

Mar. 31, 2013

Mortgages and Notes Payable [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Below is a summary of additional disclosures related to the 6.00% Convertible Guaranteed Notes due 2030.

	6.00% Convertible Guaranteed Notes
Balance Sheets:	March 31, 2013			December 31, 2012
Principal amount of debt component	$	41,146		$	83,896
Unamortized discount	(2,655		)	(5,769		)
Carrying amount of debt component	$	38,491		$	78,127
Carrying amount of equity component	$	(16,677	)	$	3,654
Effective interest rate	8.1		%	8.1		%
Period through which discount is being amortized, put date	01/2017			01/2017
Aggregate if-converted value in excess of aggregate principal amount	$	28,895		$	42,579

	Three months ended March 31,
Statements of Operations:	2013		2012
6.00% Convertible Guaranteed Notes
Coupon interest	$	788	$	1,725
Discount amortization	223		484
	$	1,011	$	2,209