Commitments And Contingencies	6 Months Ended
Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Litigation. On June 17, 2014, a purported shareholder filed a derivative complaint against all of the then-current members of our board of directors and one of our former directors, as defendants, and our company, as nominal defendant, in the Court of Chancery of the State of Delaware. Through the complaint, the plaintiff is asserting, on behalf of our company, actions for breach of fiduciary duties and unjust enrichment in connection with prior determinations of our board of directors relating to nonexecutive director compensation. The plaintiff is seeking relief including disgorgement of payments made to the defendants, an award of unspecified damages and an award for attorneys’ fees and other costs. We and the defendants filed a motion to dismiss the complaint and a supporting brief on September 5, 2014, asserting that the complaint failed to state a claim on which relief could be granted, and further that the plaintiff did not comply with procedural requirements necessary to allow him to commence litigation against certain directors on our behalf. As of the date of this report, that motion remains pending before the Court. In any event, our company is only a nominal defendant in this litigation, and we do not expect the resolution of this matter to have a material adverse effect on our results of operations, cash flows or financial position. Various other actions and claims are pending against us, most of which are covered by insurance. Although we cannot predict the ultimate outcome of these matters, we believe the ultimate liability, if any, that may result from these other actions and claims will not materially affect our results of operations, cash flows or financial position. Financial Instruments and Risk Concentration. In the normal course of business, we manage risks associated with foreign exchange rates and interest rates through a variety of strategies, including the use of hedging transactions. As a matter of policy, we do not use derivative instruments unless we have an underlying exposure. Other financial instruments that potentially subject us to concentrations of credit risk are principally cash and cash equivalents and accounts receivable. The carrying values of cash and cash equivalents approximate their fair values due to the short-term maturity of those instruments. Accounts receivable are generated from a broad group of customers, primarily from within the energy industry, which is our major source of revenue. Due to their short-term nature, carrying values of our accounts receivable and accounts payable approximate fair market values. We had borrowings of $300 million at June 30, 2015 under our term loan facility. Due to the short-term nature of the associated interest rate periods, the carrying value of our debt under the term loan facility approximates its fair value. This debt is classified as Level 2 in the fair value hierarchy under U.S. GAAP (inputs other than quoted prices in active markets for similar assets and liabilities that are observable or can be corroborated by observable market data for substantially the full term for the assets or liabilities). We estimated the fair market value of the Senior Notes to be $495 million at June 30, 2015. We arrived at this estimate by computing the net present value of the future principal and interest payments using a yield to maturity interest rate for securities of similar credit quality and term. The Senior Notes are classified as Level 2 in the fair value hierarchy under U.S. GAAP. We have an interest rate swap in place on $100 million of the Senior Notes for the period from November 2014 to November 2024. The agreement swaps the fixed interest rate of 4.650% on $100 million of the Senior Notes to the floating rate of one month LIBOR plus 2.426%. We estimate the fair value of the interest rate swap to be a liability of $0.7 million at June 30, 2015, which is reflected on our balance sheet as a component of Other Long-term Liabilities, with the offset as an adjustment to the carrying value of Long-term Debt. This liability value was arrived at using a discounted cash flow model using Level 2 inputs. In the second quarter of 2015, the exchange rate for the Angolan kwanza relative to the U.S. dollar declined approximately 14%. This caused us to record a foreign currency loss of $8.9 million related to the kwanza, and that amount is included as a component of Other expense, net in our Consolidated Statements of Income for the three- and six-month periods ended June 30, 2015. The adjustment related primarily to our cash balances in Angola. Conversion of cash balances from kwanza to U.S. dollars is controlled by the central bank in Angola, and the central bank has slowed this process during 2015, causing our cash balances in kwanza to increase. As of June 30, 2015, we had the equivalent of approximately $53 million of cash in kwanza in Angola on our balance sheet.

COMMITMENTS AND CONTINGENCIES

Litigation. On June 17, 2014, a purported shareholder filed a derivative complaint against all of the then-current members of our board of directors and one of our former directors, as defendants, and our company, as nominal defendant, in the Court of Chancery of the State of Delaware. Through the complaint, the plaintiff is asserting, on behalf of our company, actions for breach of fiduciary duties and unjust enrichment in connection with prior determinations of our board of directors relating to nonexecutive director compensation. The plaintiff is seeking relief including disgorgement of payments made to the defendants, an award of unspecified damages and an award for attorneys’ fees and other costs. We and the defendants filed a motion to dismiss the complaint and a supporting brief on September 5, 2014, asserting that the complaint failed to state a claim on which relief could be granted, and further that the plaintiff did not comply with procedural requirements necessary to allow him to commence litigation against certain directors on our behalf. As of the date of this report, that motion remains pending before the Court. In any event, our company is only a nominal defendant in this litigation, and we do not expect the resolution of this matter to have a material adverse effect on our results of operations, cash flows or financial position.

Various other actions and claims are pending against us, most of which are covered by insurance. Although we cannot predict the ultimate outcome of these matters, we believe the ultimate liability, if any, that may result from these other actions and claims will not materially affect our results of operations, cash flows or financial position.

Financial Instruments and Risk Concentration. In the normal course of business, we manage risks associated with foreign exchange rates and interest rates through a variety of strategies, including the use of hedging transactions. As a matter of policy, we do not use derivative instruments unless we have an underlying exposure. Other financial instruments that potentially subject us to concentrations of credit risk are principally cash and cash equivalents and accounts receivable.

The carrying values of cash and cash equivalents approximate their fair values due to the short-term maturity of those instruments. Accounts receivable are generated from a broad group of customers, primarily from within the energy industry, which is our major source of revenue. Due to their short-term nature, carrying values of our accounts receivable and accounts payable approximate fair market values. We had borrowings of $300 million at June 30, 2015 under our term loan facility. Due to the short-term nature of the associated interest rate periods, the carrying value of our debt under the term loan facility approximates its fair value. This debt is classified as Level 2 in the fair value hierarchy under U.S. GAAP (inputs other than quoted prices in active markets for similar assets and liabilities that are observable or can be corroborated by observable market data for substantially the full term for the assets or liabilities).

We estimated the fair market value of the Senior Notes to be $495 million at June 30, 2015. We arrived at this estimate by computing the net present value of the future principal and interest payments using a yield to maturity interest rate for securities of similar credit quality and term. The Senior Notes are classified as Level 2 in the fair value hierarchy under U.S. GAAP.

We have an interest rate swap in place on $100 million of the Senior Notes for the period from November 2014 to November 2024. The agreement swaps the fixed interest rate of 4.650% on $100 million of the Senior Notes to the floating rate of one month LIBOR plus 2.426%. We estimate the fair value of the interest rate swap to be a liability of $0.7 million at June 30, 2015, which is reflected on our balance sheet as a component of Other Long-term Liabilities, with the offset as an adjustment to the carrying value of Long-term Debt. This liability value was arrived at using a discounted cash flow model using Level 2 inputs.

In the second quarter of 2015, the exchange rate for the Angolan kwanza relative to the U.S. dollar declined approximately 14%. This caused us to record a foreign currency loss of $8.9 million related to the kwanza, and that amount is included as a component of Other expense, net in our Consolidated Statements of Income for the three- and six-month periods ended June 30, 2015. The adjustment related primarily to our cash balances in Angola. Conversion of cash balances from kwanza to U.S. dollars is controlled by the central bank in Angola, and the central bank has slowed this process during 2015, causing our cash balances in kwanza to increase. As of June 30, 2015, we had the equivalent of approximately $53 million of cash in kwanza in Angola on our balance sheet.