Recently issued accounting standards	3 Months Ended
Mar. 31, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently issued accounting standards	accounting standards In February 2016, the FASB issued guidance that changes the requirements for accounting for leases. Under the new guidance, in connection with a lease as to which an entity is a lessee, the entity generally must recognize a right-to-use asset and a lease liability on the balance sheet, initially measured as the present value of lease payments under the lease. Under previous guidance, operating leases were not recognized on the balance sheet. The Company adopted the new standard on January 1, 2019 using a modified retrospective transition approach, which requires leases existing at, or entered into after, January 1, 2019 to be recognized and measured in the condensed consolidated balance sheet. The Company recognized additional net lease assets and lease liabilities of $105.3 million and $106.6 million, respectively, upon adoption of the guidance. The difference between the additional lease assets and lease liabilities was recorded as an adjustment to the Company's opening balance of retained earnings. Prior period amounts have not been adjusted and continue to reflect the Company's historical accounting. As permitted under the new guidance, the Company has made an accounting policy election not to apply the recognition provisions of the new guidance to short term leases (leases with a lease term of 12 months or less that do not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise); instead, the Company will recognize the lease payments for short term leases on a straight-line basis over the lease term. In addition, the Company has elected to apply certain practical expedients available under the new guidance. As a result, and in connection with the transition to the new guidance, the Company will not reassess (i) whether any expired or existing contracts are or contain leases, (ii) the classification of any expired or existing leases, or (iii) initial direct costs for any existing leases. The Company applied the practical expedients described above to its entire lease portfolio at the January 1, 2019 adoption date. Furthermore, as permitted under the new guidance, the Company has made, as a practical expedient, an accounting policy election to not separate lease and non-lease components and instead will account for each separate lease component and the non-lease components associated with that lease component as a single lease component. Additional information and disclosures required by this standard are contained in Note 8. In February 2018, the FASB issued new guidance to address a narrow-scope financial reporting issue that arose as a consequence of federal tax legislation commonly referred to as the Tax Cuts and Jobs Act ("the TCJA"). Existing guidance requires that deferred tax liabilities and assets be adjusted for a change in tax laws or rates with the effect included in income from continuing operations in the reporting period that includes the enactment date. The guidance is applicable even in situations in which the related income tax effects of items in accumulated other comprehensive income were originally recognized in other comprehensive income (rather than in net income), such as amounts related to benefit plans and hedging activity. As a result, the tax effects of items within accumulated other comprehensive income (referred to as stranded tax effects) do not reflect the appropriate tax rate. The new guidance, which was effective January 1, 2019, permits reclassification of these amounts from accumulated other comprehensive income to retained earnings thereby eliminating the stranded tax effects. The new guidance also requires certain disclosures about the stranded tax effects. The Company elected not to reclassify stranded tax effects from accumulated other comprehensive income to retained earnings. From time to time, new accounting guidance is issued by the FASB or other standard setting bodies that is adopted by the Company as of the effective date or, in some cases where early adoption is permitted, in advance of the effective date. The Company has assessed the recently issued guidance that is not yet effective and, unless otherwise indicated above, believes the new guidance will not have a material impact on the its consolidated results of operations, cash flows or financial position.

accounting standards

In February 2016, the FASB issued guidance that changes the requirements for accounting for leases. Under the new guidance, in connection with a lease as to which an entity is a lessee, the entity generally must recognize a right-to-use asset and a lease liability on the balance sheet, initially measured as the present value of lease payments under the lease. Under previous guidance, operating leases were not recognized on the balance sheet. The Company adopted the new standard on January 1, 2019 using a modified retrospective transition approach, which requires leases existing at, or entered into after, January 1, 2019 to be recognized and measured in the condensed consolidated balance sheet. The Company recognized additional net lease assets and lease liabilities of $105.3 million and $106.6 million, respectively, upon adoption of the guidance. The difference between the additional lease assets and lease liabilities was recorded as an adjustment to the Company's opening balance of retained earnings. Prior period amounts have not been adjusted and continue to reflect the Company's historical accounting.

As permitted under the new guidance, the Company has made an accounting policy election not to apply the recognition provisions of the new guidance to short term leases (leases with a lease term of 12 months or less that do not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise); instead, the Company will recognize the lease payments for short term leases on a straight-line basis over the lease term. In addition, the Company has elected to apply certain practical expedients available under the new guidance. As a result, and in connection with the transition to the new guidance, the Company will not reassess (i) whether any expired or existing contracts are or contain leases, (ii) the classification of any expired or existing leases, or (iii) initial direct costs for any existing leases. The Company applied the practical expedients described above to its entire lease portfolio at the January 1, 2019 adoption date. Furthermore, as permitted under the new guidance, the Company has made, as a practical expedient, an accounting policy election to not separate lease and non-lease components and instead will account for each separate lease component and the non-lease components associated with that lease component as a single lease component. Additional information and disclosures required by this standard are contained in Note 8.

In February 2018, the FASB issued new guidance to address a narrow-scope financial reporting issue that arose as a consequence of federal tax legislation commonly referred to as the Tax Cuts and Jobs Act ("the TCJA"). Existing guidance requires that deferred tax liabilities and assets be adjusted for a change in tax laws or rates with the effect included in income from continuing operations in the reporting period that includes the enactment date. The guidance is applicable even in situations in which the related income tax effects of items in accumulated other comprehensive income were originally recognized in other comprehensive income (rather than in net income), such as amounts related to benefit plans and hedging activity. As a result, the tax effects of items within accumulated other comprehensive income (referred to as stranded tax effects) do not reflect the appropriate tax rate. The new guidance, which was effective January 1, 2019, permits reclassification of these amounts from accumulated other comprehensive income to retained earnings thereby eliminating the stranded tax effects. The new guidance also requires certain disclosures about the stranded tax effects. The Company elected not to reclassify stranded tax effects from accumulated other comprehensive income to retained earnings.

From time to time, new accounting guidance is issued by the FASB or other standard setting bodies that is adopted by the Company as of the effective date or, in some cases where early adoption is permitted, in advance of the effective date. The Company has assessed the recently issued guidance that is not yet effective and, unless otherwise indicated above, believes the new guidance will not have a material impact on the its consolidated results of operations, cash flows or financial position.