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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies  
Schedule of future minimum rental payments under noncancelable operating leases

The following represents future minimum rental payments under noncancelable operating leases (in thousands):

 

 

 

 

 

Year ended December 31—

 

 

    

 

2018

    

$

13,963

 

2019

 

 

11,892

 

2020

 

 

9,838

 

2021

 

 

7,921

 

2022

 

 

6,266

 

Thereafter

 

 

21,726

 

 

 

$

71,606