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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]  
Future Minimum Rental Payments under Non-Cancelable Operating Leases with Original Maturities of Greater than 12 Months

As of December 31, 2017, future minimum rental payments under non-cancelable operating leases with original maturities of greater than 12 months are as follows:

 

(In thousands)

 

 

 

 

2018

 

$

3,073

 

2019

 

 

927

 

2020

 

 

805

 

2021

 

 

793

 

Thereafter

 

 

2,907

 

Total

 

$

8,505