Revenues	6 Months Ended
Jun. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. Payment terms on services and products generally range from 30 days to 120 days. Given the short-term nature of our service and product offerings, our contracts do not have a significant financing component and the consideration we receive is generally fixed. Service revenues are recognized over time as services are performed or rendered. We generally perform services either under direct service purchase orders or master service agreements which are supplemented by individual call-out provisions. For customers contracted under such arrangements, an accrual is recorded in unbilled revenue for revenue earned but not yet invoiced. Revenues on product sales are generally recognized at a point in time when the product has shipped and significant risks of ownership have passed to the customer. The sales arrangements typically do not include a right of return or other similar provisions, nor do they contain any other post-delivery obligations. Some of our Tubular Sales and Blackhawk segment customers have requested that we store pipe, connectors and other products purchased from us in our facilities. We recognize revenues for these “bill and hold” sales once the following criteria have been met: (1) there is a substantive reason for the arrangement, (2) the product is identified as the customer's asset, (3) the product is ready for delivery to the customer, and (4) we cannot use the product or direct it to another customer. Practical Expedients We elected to apply certain practical expedients available under the new revenue standard. We elected to expense cost of obtaining contracts, such as sales commissions, when incurred because the amortization period would have been one year or less due to the length of our contracts. We have also elected not to assess immaterial promises in the context of our contracts as performance obligations and to exclude taxes from the assessment of transaction price in arrangements where taxes are collected by the entity from a customer. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. Because our contracts with customers are short-term in nature and fall within this exemption, we do not have significant unsatisfied performance obligations as defined by the new revenue standard.

Revenues

Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. Payment terms on services and products generally range from 30 days to 120 days. Given the short-term nature of our service and product offerings, our contracts do not have a significant financing component and the consideration we receive is generally fixed.

Service revenues are recognized over time as services are performed or rendered. We generally perform services either under direct service purchase orders or master service agreements which are supplemented by individual call-out provisions. For customers contracted under such arrangements, an accrual is recorded in unbilled revenue for revenue earned but not yet invoiced.

Revenues on product sales are generally recognized at a point in time when the product has shipped and significant risks of ownership have passed to the customer. The sales arrangements typically do not include a right of return or other similar provisions, nor do they contain any other post-delivery obligations.

Some of our Tubular Sales and Blackhawk segment customers have requested that we store pipe, connectors and other products purchased from us in our facilities. We recognize revenues for these “bill and hold” sales once the following criteria have been met: (1) there is a substantive reason for the arrangement, (2) the product is identified as the customer's asset, (3) the product is ready for delivery to the customer, and (4) we cannot use the product or direct it to another customer.

Practical Expedients

We elected to apply certain practical expedients available under the new revenue standard. We elected to expense cost of obtaining contracts, such as sales commissions, when incurred because the amortization period would have been one year or less due to the length of our contracts. We have also elected not to assess immaterial promises in the context of our contracts as performance obligations and to exclude taxes from the assessment of transaction price in arrangements where taxes are collected by the entity from a customer.

We do not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. Because our contracts with customers are short-term in nature and fall within this exemption, we do not have significant unsatisfied performance obligations as defined by the new revenue standard.