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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations
Revenues	$ 3,912	$ 9,774	$ 18,419	$ 32,868
Operating Expenses	(1,398)	(3,985)	(6,993)	(12,623)
Depreciation and amortization, discontinued operations	(844)	(4,937)	(6,686)	(15,903)
Operating Income (Loss)	1,670	852	4,740	4,342
Interest Expense	(769)	(2,822)	(4,670)	(9,041)
Income (loss) before gain on sales	901	(1,970)	70	(4,699)
Gains on depreciated property sales on discontinued operations	8,441	1,608	101,052	11,179
Income (loss) from discontinued operations	$ 9,342	$ (362)	$ 101,122	$ 6,480