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Non-controlling Interests (Tables)
 6 Months Ended
Jun. 30, 2015
Non-controlling Interests [Abstract]  
Changes in Non-controlling Interest

  
Three Months Ended June 30,
  
Six Months Ended June 30,
 
  
2015
  
2014
  
2015
  
2014
 
Non-controlling interest, beginning of period
 
$
969
  
$
264
  
$
584
  
$
454
 
Net income
  
362
   
343
   
747
   
601
 
Distributions
  
(961
)
  
(257
)
  
(961
)
  
(705
)
 
Non-controlling interest, end of period
 
$
370
  
$
350
  
$
370
  
$
350