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Variable interest entities (Tables)
12 Months Ended
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Carrying Value of Variable Interest Entities of Consolidated Financial Statements
The carrying values of VIEs included in the consolidated financial statements as of December 31, 2018 and December 31, 2017 are as follows:
 
December 31, 2018
 
December 31, 2017
 
Assets
 
Liabilities
 
Assets
 
Liabilities
PF Melville
$
4,787

 
$

 
$
4,420

 
$

MMR
$
3,563

 

 
$
3,360

 

Total
$
8,350

 
$

 
$
7,780

 
$