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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies [Abstract]  
Future minimum rental receipts

 

 

 

 

 

 

 

 

 

 

Year ended December 31,

  

Amount

 

2018

  

$

156,343

  

2019

  

 

106,422

  

2020

  

 

87,617

  

2021

  

 

54,584

  

2022

  

 

53,564

  

Thereafter

  

 

111,647

  

 

  

 

 

 

Total

  

$

570,177