Leases Leases (Policies)	3 Months Ended
Mar. 31, 2019
Lessee, Leases [Policy Text Block]	We assess whether an arrangement is or contains a lease at the inception of the agreement. ROU assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term using our incremental borrowing rate, which is consistent with interest rates of similar financing arrangements based on the information available at the commencement date. The ROU assets were also adjusted to include any prepaid lease payments and reduced by any previously accrued lease liabilities. The terms of our leases used to determine the ROU asset and lease liability take into account options to extend when it is reasonably certain that we will exercise those options. Lease expense is recognized on a straight-line basis over the lease term. Additionally, we have elected the short-term lease measurement and recognition exemption and do not establish ROU assets or lease liabilities for operating leases with terms of 12 months or less.
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	In February 2016, the FASB issued a new standard related to leases, ASU 2016-02, Leases (Topic 842) (“ASC 842”). We adopted the standard effective January 1, 2019, using the retrospective approach applied as of the beginning of the period of adoption. The Company elected to utilize the transition guidance within the new standard that permits us to (i) continue to report under legacy lease accounting guidance for comparative periods consistent with previously issued financial statements; and (ii) carryforward our prior conclusions about lease identification, lease classification, and initial direct costs. The most significant effects of adopting the new standard relate to the recognition of right-of-use (“ROU”) assets and liabilities for leases classified as operating leases when the Company is the lessee in the arrangement. Adopting the new standard did not affect our accounting related to leases when the Company is the lessor in the arrangement.

Leases Leases (Policies)

3 Months Ended

Mar. 31, 2019

We assess whether an arrangement is or contains a lease at the inception of the agreement. ROU assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term using our incremental borrowing rate, which is consistent with interest rates of similar financing arrangements based on the information available at the commencement date. The ROU assets were also adjusted to include any prepaid lease payments and reduced by any previously accrued lease liabilities. The terms of our leases used to determine the ROU asset and lease liability take into account options to extend when it is reasonably certain that we will exercise those options. Lease expense is recognized on a straight-line basis over the lease term. Additionally, we have elected the short-term lease measurement and recognition exemption and do not establish ROU assets or lease liabilities for operating leases with terms of 12 months or less.

Accounting Standards Update 2016-02 [Member]

New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method

In February 2016, the FASB issued a new standard related to leases, ASU 2016-02, Leases (Topic 842) (“ASC 842”). We adopted the standard effective January 1, 2019, using the retrospective approach applied as of the beginning of the period of adoption. The Company elected to utilize the transition guidance within the new standard that permits us to (i) continue to report under legacy lease accounting guidance for comparative periods consistent with previously issued financial statements; and (ii) carryforward our prior conclusions about lease identification, lease classification, and initial direct costs. The most significant effects of adopting the new standard relate to the recognition of right-of-use (“ROU”) assets and liabilities for leases classified as operating leases when the Company is the lessee in the arrangement. Adopting the new standard did not affect our accounting related to leases when the Company is the lessor in the arrangement.