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Other Non-Current Liabilities
12 Months Ended
Dec. 31, 2020
Other Liabilities Disclosure [Abstract]  
Other Non-Current Liabilities

15.  Other Non-Current Liabilities

The composition of other non-current liabilities was as follows:

 

 

 

December 31

 

(In thousands)

 

2020

 

 

2019

 

Deferred revenue

 

$

11,276

 

 

$

891

 

Environmental and legal matters

 

 

17,921

 

 

 

12,023

 

Deferred compensation liability

 

 

51,508

 

 

 

49,835

 

Pension liability

 

 

17,229

 

 

 

19,407

 

Other non-current liabilities

 

 

16,359

 

 

 

14,024

 

Total other non-current liabilities

 

$

114,293

 

 

$

96,180