v3.10.0.1
Grants and other liabilities (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2018
USD ($)
Type
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Oct. 02, 2013
USD ($)
Grants and other liabilities [Abstract]        
Grants $ 1,182,650   $ 1,225,877  
Other Liabilities 479,729   410,183  
Grant and other non-current liabilities $ 1,662,379   1,636,060  
Number of grant types | Type 2      
Income from grants $ 29,719 $ 29,882    
Solana and Mojave [Member]        
Grants and other liabilities [Abstract]        
Income from grants 29,600 $ 29,800    
U.S. Department of Treasury [Member]        
Grants and other liabilities [Abstract]        
Grants 755,000   771,000  
Federal Financing Bank [Member]        
Grants and other liabilities [Abstract]        
Grants 426,000   452,000  
Liberty Interactive Corporation [Member]        
Grants and other liabilities [Abstract]        
Grant and other non-current liabilities 363,000   $ 352,000  
Class A membership investment       $ 300,000
Finance lease liabilities $ 57,000