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Sale of Assets (Tables)
 9 Months Ended
Sep. 30, 2012
Sale of Assets [Abstract]  
Changes in non-controlling interest
The following table details the changes in non-controlling interest for the three and nine months ended September 30, 2012 and 2011 (in thousands):
 
Three Months Ended September 30,
 
 
Nine Months Ended September 30,
 
 
2012
 
 
2011
 
 
2012
 
 
2011
 
Non-controlling interest, beginning of period
 
$
 683
 
 
$
 410
 
 
$
 381
 
 
$
 454
 
Net income
 
 
725
 
 
 
1,100
 
 
 
1,599
 
 
 
1,672
 
Distributions
 
 
(677
)
 
 
(405
)
 
 
(1,249
)
 
 
(1,021
)
 
Non-controlling interest, end of period
 
$
 731
 
 
$
 1,105
 
 
$
 731
 
 
$
 1,105