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Non-controlling Interests (Tables)
 12 Months Ended
Dec. 31, 2017
Non-controlling Interests [Abstract]  
Changes in Non-controlling Interest
The following table details the changes in non-controlling interest for the years ended December 31, 2017, 2016, and 2015 (in thousands):

  
2017
  
2016
  
2015
 
 
Non-controlling interest, beginning of period
 
$
2,229
  
$
635
  
$
584
 
Net income
  
2,335
   
3,506
   
2,438
 
Distributions
  
(3,651
)
  
(1,912
)
  
(2,387
)
 
Non-controlling interest, end of period
 
$
913
  
$
2,229
  
$
635