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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of rent expense associated with operating leases
The table below presents rent expense associated with facility and vehicle operating leases for the past three years (in thousands):
Lease CostClassification201920182017
Operating lease cost (1)
Selling and administrative expenses  $60,104  $57,235  $54,023  
Variable lease cost  Selling and administrative expenses  $13,778  $12,867  $12,138  
Lease cost table text block
Based on our lease portfolio as of December 31, 2019, the table below sets forth the approximate future lease payments related to operating leases with initial terms of one year or more (in thousands):

2020$51,621  
202145,992  
202237,044  
202324,711  
202414,060  
Thereafter15,939  
Total lease payments189,367  
Less: interest11,032  
Present value of lease liabilities$178,335  
us-gaap_LeaseCostTableTextBlock The table below presents the weighted-average remaining lease term (years) of our operating leases and the weighted-average discount rate used in the above calculation:
December 31,
Lease Term and Discount Rate for Operating Leases  2019
Weighted-average remaining lease term (years) 4.57
Weighted-average discount rate  3.41 %
us-gaap_LeaseCostTableTextBlock1
The table below presents the amount of cash paid for amounts included in the measurement of lease liabilities (in thousands):

Year Ended
December 31,
2019
Operating cash flows for lease liabilities$56,617