Discontinued Operations and Assets Held for Sale (Table Illustration of Discontinued Operations in Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Discontinued Operations
Revenues	$ 2,906	$ 8,459	$ 9,877	$ 18,026
Operating Expenses	(1,093)	(2,896)	(3,478)	(6,636)
Depreciation and Amortization, Discontinued Operations	(714)	(4,276)	(4,238)	(9,246)
Operating Income (Loss)	1,099	1,287	2,161	2,144
Interest Expense	(1,069)	(2,376)	(2,861)	(5,108)
Income (loss) before gain on sales	30	(1,089)	(700)	(2,964)
Gains on depreciated property sales on discontinued operations	83,657	3,095	92,611	9,571
Income (loss) from discontinued operations	$ 83,687	$ 2,006	$ 91,911	$ 6,607