Write off of Amortization of Leased Assets- the write off of all future lease expense, and any capitalized deferred leasing costs, on operating lease of assets determined to be no longer in use for the remaining life of the lease.

No definition available.

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- Definition

[Line Items] for Write off of Amortization of Leased Assets [Table]

+ References

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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- Definition

Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.

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Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Write off of Amortization of Leased Assets [Line Items]
Non-cash provision for leased items no longer in use		$ 0	$ 12,589
Loss contingency accrual		8,200
Accrued Liabilities
Write off of Amortization of Leased Assets [Line Items]
Loss contingency, accrual, current		$ 3,400
Onshore Facilities & Transportation
Write off of Amortization of Leased Assets [Line Items]
Non-cash provision for leased items no longer in use	$ 12,600