Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Schedule of Depreciation, Amortization, Accretion, and Depletion (Details)

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Property, Plant and Equipment - Schedule of Depreciation, Amortization, Accretion, and Depletion (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 112,435 $ 107,634 $ 81,191
Accretion and depletion expense (see Note 2) 3,477 3,539 1,632
Amortization expense (see Note 8) 1,121 8,704 9,301
Depreciation, depletion, amortization and accretion $ 117,033 $ 119,877 $ 92,124 [1]
[1] Financial information includes the results attributable to Sturgeon for the entire period presented. See Note 4.