Revenue from Contracts with Customers Deferred Revenues and Costs (Details) - Drilling Services [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018
Deferred Revenues and Costs, Classified
Current deferred revenues	$ 1,722	$ 1,287
Current deferred costs	1,543	1,072
Noncurrent deferred revenues	437	564
Noncurrent deferred costs	$ 679	$ 1,177

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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Balance Type:	debit
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- Definition

+ References

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.

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- Definition

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.

+ References

No definition available.

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