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Asset Dispositions (Tables)
12 Months Ended
Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]  
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
Below is a summary of the results of operations for the properties through the date of disposition for all periods presented (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2013
 
2012
 
2011
 
 
 
 
 
 
 
 
 
 
 
 
Revenue
 
$
9,754
 
$
8,993
 
$
8,599
 
Operating expenses
 
 
5,354
 
 
5,184
 
 
4,960
 
Operating income
 
 
4,400
 
 
3,809
 
 
3,639
 
Depreciation and amortization
 
 
2,672
 
 
3,144
 
 
3,566
 
Net income
 
$
1,728
 
$
665
 
$
73
 
Impairment on discontinued operations
 
 
(4,729)
 
 
-
 
 
-
 
Income (loss) from discontinued operations
 
$
(3,001)
 
$
665
 
$
73