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Leases (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Short-term lease cost	$ 3,174	$ 8,083
Financing lease cost	348	645
Operating lease cost	43	101
Total lease cost	3,565	8,829
Short-term lease, cost, capitalized	$ 1,900	$ 5,100
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Right-of-use asset			$ 2,300
Finance lease, liability			$ 2,400

X

- Definition

Short-term lease, cost, capitalized

+ References

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount of lessee's right to use underlying asset under finance lease.

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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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