Segment Information - Reconciliation of Capital Expenditures (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Segment Reporting Information [Line Items] | |||
Capital Expenditures | $ 107,278 | $ 101,620 | $ 92,625 |
Segment Reconciling Items | |||
Segment Reporting Information [Line Items] | |||
Capital Expenditures | 6,510 | 4,013 | 2,925 |
Mining | Operating Segments | |||
Segment Reporting Information [Line Items] | |||
Capital Expenditures | $ 100,768 | $ 97,607 | $ 89,700 |