Recently Adopted and New Accounting Standards	3 Months Ended
Mar. 31, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Adopted and New Accounting Standards	Recently Adopted and New Accounting Standards Recently Adopted On January 1, 2019, we adopted ASU 2016-02, Leases (Topic 842), and subsequent ASUs related to Topic 842. The new guidance increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The adoption of Topic 842 had a material impact on our Consolidated Balance Sheet due to the recognition of right-of-use assets of $82.5 million and lease liabilities of $87.7 million, respectively, as of January 1, 2019. The difference between these lease assets and lease liabilities represents existing deferred rent balances that were reclassified on the balance sheet. The adoption of Topic 842 did not have a material impact on our Consolidated Statement of Operations or our Consolidated Statement of Cash Flows. We will continue to report periods prior to January 1, 2019 under prior guidance as outlined in Accounting Standards Codification Topic 840, "Leases." Refer to Note 4, "Leases," for further discussion. New Accounting Standards In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40). This ASU requires capitalization of certain implementation costs incurred in a cloud computing arrangement that is a service contract. Amendments in this ASU are effective for fiscal years beginning after December 15, 2019 and for interim periods therein, with early adoption permitted. We do not believe this ASU will have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20), which modifies the disclosure requirements for defined benefit and other postretirement plans. This ASU eliminates certain disclosures associated with accumulated other comprehensive income, plan assets, related parties, and the effects of interest rate basis point changes on assumed health care costs, with other disclosures being added to address significant gains and losses related to changes in benefit obligations. This ASU also clarifies disclosure requirements for projected benefit and accumulated benefit obligations. The amendments in this ASU are effective for fiscal years ending after December 15, 2020, with early adoption permitted and adoption on a retrospective basis for all periods presented required. We are currently assessing the timing of our adoption of this ASU and do not believe it will have a material impact on our consolidated financial statements beyond updating footnote disclosures. We reviewed all other new accounting pronouncements issued in the period and concluded that they are not applicable to our business.

Recently Adopted and New Accounting Standards

Recently Adopted

On January 1, 2019, we adopted ASU 2016-02, Leases (Topic 842), and subsequent ASUs related to Topic 842. The new guidance increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The adoption of Topic 842 had a material impact on our Consolidated Balance Sheet due to the recognition of right-of-use assets of $82.5 million and lease liabilities of $87.7 million, respectively, as of January 1, 2019. The difference between these lease assets and lease liabilities represents existing deferred rent balances that were reclassified on the balance sheet. The adoption of Topic 842 did not have a material impact on our Consolidated Statement of Operations or our Consolidated Statement of Cash Flows. We will continue to report periods prior to January 1, 2019 under prior guidance as outlined in Accounting Standards Codification Topic 840, "Leases." Refer to Note 4, "Leases," for further discussion.

New Accounting Standards

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40). This ASU requires capitalization of certain implementation costs incurred in a cloud computing arrangement that is a service contract. Amendments in this ASU are effective for fiscal years beginning after December 15, 2019 and for interim periods therein, with early adoption permitted. We do not believe this ASU will have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20), which modifies the disclosure requirements for defined benefit and other postretirement plans. This ASU eliminates certain disclosures associated with accumulated other comprehensive income, plan assets, related parties, and the effects of interest rate basis point changes on assumed health care costs, with other disclosures being added to address significant gains and losses related to changes in benefit obligations. This ASU also clarifies disclosure requirements for projected benefit and accumulated benefit obligations. The amendments in this ASU are effective for fiscal years ending after December 15, 2020, with early adoption permitted and adoption on a retrospective basis for all periods presented required. We are currently assessing the timing of our adoption of this ASU and do not believe it will have a material impact on our consolidated financial statements beyond updating footnote disclosures.

We reviewed all other new accounting pronouncements issued in the period and concluded that they are not applicable to our business.