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Leases (Tables)
12 Months Ended
Dec. 31, 2018
Leases [Abstract]  
Summary of Future Minimum Rental Payments Under Operating Leases

Future minimum rental payments required under operating leases having initial or remaining non-cancelable lease terms in excess of one year at December 31, 2018 are as follows (in thousands):

 

Year ending December 31,

 

 

 

 

2019

 

$

11,408

 

2020

 

 

9,069

 

2021

 

 

6,543

 

2022

 

 

4,625

 

2023

 

 

2,663

 

Thereafter

 

 

6,552

 

Total

 

$

40,860