Recent Accounting Standards (Policy)	3 Months Ended
Mar. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	Accounting Standards Not Yet Adopted In February 2016, the FASB issued ASU No. 2016-02, Leases. This standard will require all leases with durations greater than twelve months to be recognized on the balance sheet as a right-of-use asset and a lease liability. ASU 2016-02 is effective for public companies for annual reporting periods beginning after December 15, 2018, and interim periods within those fiscal years. We plan to adopt the standard effective January 1, 2019. We expect the adoption of this standard to increase the assets and liabilities recorded on our condensed consolidated balance sheet and increase the level of disclosures related to leases. We also expect that adoption of the new standard will require changes to our internal controls to support recognition and disclosure requirements under the new standard. We are currently evaluating ASU No. 2016-02 and the impact of its adoption on our consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment. The standard will remove step 2 from the goodwill impairment test. Under the ASU, an entity should perform its annual goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value, however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. ASU 2017-04 is effective for public companies for annual reporting periods beginning after December 15, 2019. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. We are currently evaluating ASU 2017-04 and the impact of its adoption on our consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities. The standard will ease the administrative burden of hedge documentation requirements and assessing hedge effectiveness. ASU 2017-12 is effective for public companies for annual reporting periods beginning after December 15, 2018 but early adoption is permitted. We are currently evaluating ASU 2017-12 and the impact of its adoption on our consolidated financial statements. Accounting Standard Adopted In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Accounting Standards Codification (ASC) Topic 606), which provides a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. We adopted ASC Topic 606 on January 1, 2018 using the modified retrospective method. Under this transition method, we applied the new standard to contracts that were not completed as of the adoption date and recognized a cumulative effect adjustment which reduced retained earnings by $0.4 million on January 1, 2018. The comparative prior period information has not been restated and continues to be presented according to accounting standards in effect for those periods. The primary impact of ASU No. 2014-09 on our financial statements is a change in revenue recognition on a small portion of our contracts from a proportional performance method, where revenue was previously recognized over contract performance, to a point in time method, where revenue is now recognized upon completion of our performance obligations. While we don't believe the adoption of ASU 2014-09 will materially impact our overall financial statements, the change in timing of revenue recognition on certain contracts could result in quarter to quarter fluctuations in revenue. See Note 3 for further details regarding our revenue recognition accounting policies and other required disclosures.

Accounting Standards Not Yet Adopted

In February 2016, the FASB issued ASU No. 2016-02, Leases. This standard will require all leases with durations greater than twelve months to be recognized on the balance sheet as a right-of-use asset and a lease liability. ASU 2016-02 is effective for public companies for annual reporting periods beginning after December 15, 2018, and interim periods within those fiscal years. We plan to adopt the standard effective January 1, 2019. We expect the adoption of this standard to increase the assets and liabilities recorded on our condensed consolidated balance sheet and increase the level of disclosures related to leases. We also expect that adoption of the new standard will require changes to our internal controls to support recognition and disclosure requirements under the new standard. We are currently evaluating ASU No. 2016-02 and the impact of its adoption on our consolidated financial statements.

In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment. The standard will remove step 2 from the goodwill impairment test. Under the ASU, an entity should perform its annual goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value, however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. ASU 2017-04 is effective for public companies for annual reporting periods beginning after December 15, 2019. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. We are currently evaluating ASU 2017-04 and the impact of its adoption on our consolidated financial statements.

In August 2017, the FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities. The standard will ease the administrative burden of hedge documentation requirements and assessing hedge effectiveness. ASU 2017-12 is effective for public companies for annual reporting periods beginning after December 15, 2018 but early adoption is permitted. We are currently evaluating ASU 2017-12 and the impact of its adoption on our consolidated financial statements.

Accounting Standard Adopted

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Accounting Standards Codification (ASC) Topic 606), which provides a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. We adopted ASC Topic 606 on January 1, 2018 using the modified retrospective method. Under this transition method, we applied the new standard to contracts that were not completed as of the adoption date and recognized a cumulative effect adjustment which reduced retained earnings by $0.4 million on January 1, 2018. The comparative prior period information has not been restated and continues to be presented according to accounting standards in effect for those periods. The primary impact of ASU No. 2014-09 on our financial statements is a change in revenue recognition on a small portion of our contracts from a proportional performance method, where revenue was previously recognized over contract performance, to a point in time method, where revenue is now recognized upon completion of our performance obligations. While we don't believe the adoption of ASU 2014-09 will materially impact our overall financial statements, the change in timing of revenue recognition on certain contracts could result in quarter to quarter fluctuations in revenue. See Note 3 for further details regarding our revenue recognition accounting policies and other required disclosures.