Leases - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2019
Lessor Lease Description [Line Items]
Total lease cost	$ 1,058	$ 2,062
Selling, General and Administrative
Lessor Lease Description [Line Items]
Operating lease cost	371	745
Short-term lease costs	589	1,118
Amortization of leased assets	92	184
Net Interest Expense
Lessor Lease Description [Line Items]
Interest on lease liabilities	$ 6	$ 15

The expense charged against earnings for the periodic recognition of capitalized leases. This element may apply to energy companies that lease mineral producing properties and to other enterprises that capitalize property, plant, or equipment obtained through capital leases.

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Amount of interest expense on finance lease liability.

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Amount of lease cost recognized by lessee for lease contract.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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