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Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Inventory
Crude oil inventory	$ 7,057	$ 18,296
Equipment and materials	25,943	16,963
Total inventory	33,000	35,259
Long-term inventory
Linefill in third party pipelines	14,053	13,924
Total long-term inventory	14,053	13,924
Total	$ 47,053	$ 49,183

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- Definition

This element represents the aggregate of current and non-current inventory, including linefill.

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Inventory, Noncurrent, Linefill

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- Definition

Carrying amount as of the balance sheet date of petroleum or crude oil.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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