Annual report pursuant to Section 13 and 15(d)

Other Non-Current Assets (Details)

v3.10.0.1
Other Non-Current Assets (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
option
Dec. 31, 2017
USD ($)
Operating Leased Assets [Line Items]    
Land lease and purchase options $ 4,115 $ 2,948
Permitting costs 12,585 4,708
Other 1,959 1,620
Total other non-current assets $ 18,659 $ 9,276
Term of lease (in years) 4 years  
Extension term (in years) 20 years  
Number of renewal terms | option 6  
Renewal term (in years) 5 years  
Maximum terms (in years) 60 years  
Minimum    
Operating Leased Assets [Line Items]    
Term of lease (in years) 4 years  
Maximum    
Operating Leased Assets [Line Items]    
Term of lease (in years) 5 years