Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Schedule of Other Assets (Long-term) (Details)

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Basis of Presentation - Schedule of Other Assets (Long-term) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Other Assets [Abstract]    
Escrow deposit - Apache lawsuit $ 49,500  
Appeal bond deposits 6,925 $ 6,925
Other 4,354 4,539
Total other assets $ 60,779 $ 11,464