Accounting Policies	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
Accounting Policies	Accounting Policies New Accounting Pronouncements Adopted In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers,” which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted ASU 2014-09 and related amendments, which is also known as Accounting Standards Codification (“ASC”) Topic 606, as of January 1, 2018 using the modified retrospective transition method. We expect the impact of the adoption of the new standard to be immaterial to our net income on an ongoing basis. See Note 2 - Revenue for additional adoption information, the updated accounting policy for revenue recognition, and disclosures required by ASC Topic 606. In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The Company adopted ASU No. 2016-15 as of January 1, 2018. Upon adoption, this update had no effect on our consolidated financial position, results of operations or cash flows. In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash,” which requires an entity to include in its cash and cash-equivalent balances in the statement of cash flows those amounts that are deemed to be restricted cash and restricted cash equivalents. The Company adopted ASU No. 2016-18 as of January 1, 2018, using the required retrospective adoption method. The adoption of this standard impacted the consolidated statements of cash flows by increasing beginning and ending cash to include the restricted balance of our like-kind exchange account and removing from operating activities the change in such balance, which resulted in a $6.3 million increase to cash flow from operations for the nine months ended September 30, 2017. In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting,” which provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The Company adopted ASU No. 2017-09 as of January 1, 2018 on a prospective basis. Upon adoption, this update had no effect on our consolidated financial position, results of operations or cash flows. Accounting Standards Updates Not Yet Effective In February 2016, the FASB issued ASU No. 2016-02, “Leases,” to increase transparency and comparability by recognizing a right-of-use asset and a lease liability on the balance sheet and disclosing key information about leasing arrangements. The provisions of this update and additional guidance in subsequent ASUs will become effective for us beginning January 1, 2019. In July 2018, the FASB issued ASU No. 2018-11, “Leases,” which provides an optional transition method allowing entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, with no restatement of comparative prior periods required. We currently intend to adopt the standard using this optional transition method. We continue to assess the contractual arrangements that may qualify as a lease under the new standard and to evaluate the impact of adopting ASU No. 2016-02 on our consolidated financial position, results of operations and cash flows. In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” with the objective of improving the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. The provisions of this update are effective for fiscal years beginning after December 15, 2018. We are evaluating the impact of adopting ASU No. 2017-12 on our financial position, results of operations and cash flows. In February 2018, the FASB issued ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Comprehensive Income,” which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The provisions of this update are effective for fiscal years beginning after December 15, 2018. We are evaluating the impact of adopting ASU No. 2018-02 on our financial position, results of operations and cash flows. In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies the disclosure requirements on fair value measurements. As part of its disclosure framework project, the FASB has eliminated, amended and added disclosure requirements for fair value measurements in Topic 820, Fair Value Measurement. The provisions of this update are effective for fiscal years beginning after December 15, 2019. Although we are evaluating the impact of adopting ASU No. 2018-13 on our financial position, results of operations and cash flows, we do not expect a material effect upon adoption because we do not currently disclose any fair value measurements subject to the amendments. In August 2018, the FASB issued ASU No. 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force),” which updates the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract to align with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. We are evaluating the impact of adopting ASU No. 2018-15 on our financial position, results of operations and cash flows.

Accounting Policies

New Accounting Pronouncements Adopted

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers,” which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The Company adopted ASU 2014-09 and related amendments, which is also known as Accounting Standards Codification (“ASC”) Topic 606, as of January 1, 2018 using the modified retrospective transition method. We expect the impact of the adoption of the new standard to be immaterial to our net income on an ongoing basis. See Note 2 - Revenue for additional adoption information, the updated accounting policy for revenue recognition, and disclosures required by ASC Topic 606.

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The Company adopted ASU No. 2016-15 as of January 1, 2018. Upon adoption, this update had no effect on our consolidated financial position, results of operations or cash flows.

In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash,” which requires an entity to include in its cash and cash-equivalent balances in the statement of cash flows those amounts that are deemed to be restricted cash and restricted cash equivalents. The Company adopted ASU No. 2016-18 as of January 1, 2018, using the required retrospective adoption method. The adoption of this standard impacted the consolidated statements of cash flows by increasing beginning and ending cash to include the restricted balance of our like-kind exchange account and removing from operating activities the change in such balance, which resulted in a $6.3 million increase to cash flow from operations for the nine months ended September 30, 2017.

In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting,” which provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The Company adopted ASU No. 2017-09 as of January 1, 2018 on a prospective basis. Upon adoption, this update had no effect on our consolidated financial position, results of operations or cash flows.

Accounting Standards Updates Not Yet Effective

In February 2016, the FASB issued ASU No. 2016-02, “Leases,” to increase transparency and comparability by recognizing a right-of-use asset and a lease liability on the balance sheet and disclosing key information about leasing arrangements. The provisions of this update and additional guidance in subsequent ASUs will become effective for us beginning January 1, 2019. In July 2018, the FASB issued ASU No. 2018-11, “Leases,” which provides an optional transition method allowing entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption, with no restatement of comparative prior periods required. We currently intend to adopt the standard using this optional transition method. We continue to assess the contractual arrangements that may qualify as a lease under the new standard and to evaluate the impact of adopting ASU No. 2016-02 on our consolidated financial position, results of operations and cash flows.

In August 2017, the FASB issued ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” with the objective of improving the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. The provisions of this update are effective for fiscal years beginning after December 15, 2018. We are evaluating the impact of adopting ASU No. 2017-12 on our financial position, results of operations and cash flows.

In February 2018, the FASB issued ASU No. 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Comprehensive Income,” which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The provisions of this update are effective for fiscal years beginning after December 15, 2018. We are evaluating the impact of adopting ASU No. 2018-02 on our financial position, results of operations and cash flows.

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement,” which modifies the disclosure requirements on fair value measurements. As part of its disclosure framework project, the FASB has eliminated, amended and added disclosure requirements for fair value measurements in Topic 820, Fair Value Measurement. The provisions of this update are effective for fiscal years beginning after December 15, 2019. Although we are evaluating the impact of adopting ASU No. 2018-13 on our financial position, results of operations and cash flows, we do not expect a material effect upon adoption because we do not currently disclose any fair value measurements subject to the amendments.

In August 2018, the FASB issued ASU No. 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force),” which updates the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract to align with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. We are evaluating the impact of adopting ASU No. 2018-15 on our financial position, results of operations and cash flows.