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Restricted cash (Tables)
 6 Months Ended
Jun. 30, 2020
Restricted cash [Abstract]  
Restricted Cash
As of June 30, 2020 and December 31, 2019, restricted cash consisted of the following:

  
June 30,
2020
    
December 31,
2019
  
Collateral for performance under customer agreements
  
$
15,000
    
$
15,000
  
Collateral for LNG purchases
    
26,476
      
35,000
  
Collateral for letters of credit and performance bonds
    
6,220
      
7,388
  
Debt service reserve account
    
8,131
      
8,299
  
Other restricted cash
    
250
      
250
  
Total restricted cash
  
$
56,077
    
$
65,937
  
                 
Current restricted cash
  
$
32,946
    
$
30,966
  
Non-current restricted cash
    
23,131
      
34,971