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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of future minimum payments related to operating and capital leases
Future minimum payments related to our operating and capital leases, and contractual obligations including interest on outstanding term loans are as follows:
 
 
 
 
Payments Due by Period
Contractual Obligations 
 
Total
 
2019
 
2020
 
2021
 
2022
 
2023
 
More than 5 Years
Operating leases
 
$
15,386

 
$
4,879

 
$
4,719

 
$
4,754

 
$
966

 
$
68

 
$
—

Purchase commitments
 
2,761

 
741

 
711

 
674

 
635

 
—

 
—

Capital leases
 
205

 
41

 
41

 
41

 
41

 
41

 
—

Total
 
$
18,352

 
$
5,661

 
$
5,471

 
$
5,469

 
$
1,642

 
$
109

 
$
—