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Other Noncurrent Assets, Net (Tables)
 9 Months Ended
Sep. 30, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]  
Summary of Other Noncurrent Assets

 

 

December 31,

 

 

September 30,

 

 

2017

 

 

2018

 

 

(In thousands)

 

Restricted cash

$

1,255

 

 

$

1,089

 

Pension asset

 

2,593

 

 

 

2,847

 

Other

 

995

 

 

 

1,201

 

 

 

 

 

 

 

 

 

Total

$

4,843

 

 

$

5,137