Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Schedule of Other Assets (Long-term) (Details)

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Significant Accounting Policies - Schedule of Other Assets (Long-term) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other Assets [Abstract]    
Escrow deposit - Apache lawsuit $ 49,500  
Appeal bond deposits 6,925 $ 6,925
Investment in White Cap, LLC 2,511 2,520
Other 1,457 2,019
Total other assets $ 60,393 $ 11,464