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Leases (Tables)
 12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Summary of Components of Leasing Revenue
The following table summarizes the components of leasing revenue for the years ended December 31, 2019, 2018 and 2017:

201920182017
Leasing revenue - fixed payments$647,876  $659,991  $677,503  
Leasing revenue - variable payments210,998  224,005  244,649  
$858,874  $883,996  $922,152  
Schedule of Future Minimum Rental Payments by the Company
The following table summarizes the future rental payments to the Company:
2020$490,510  
2021418,884  
2022364,768  
2023315,868  
2024250,216  
Thereafter741,235  
$2,581,481  
Summary of Lease Costs
The following table summarizes the lease costs for the the year ended December 31, 2019:
Operating lease costs$17,070  
Finance lease costs:
   Amortization of ROU assets1,882  
   Interest on lease liabilities596  
$19,548  
Summary of Future Minimum Rental Payments Required
The following table summarizes the future rental payments required under the leases as of December 31, 2019:
Year endingOperating
Leases 		 Finance Leases  
2020$17,149  $2,106  
202117,004  10,441  
202216,867  2,418  
202311,055  —  
20249,068  —  
Thereafter131,347  —  
Total undiscounted rental payments202,490  14,965  
Less imputed interest(102,085) (1,169) 
Total lease liabilities$100,405  $13,796