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Leases | 3 Months Ended
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Mar. 31, 2020
Leases |
Leases | Note 15—Leases ​ We lease administrative and various operational facilities, which are generally longer-term, project specific facilities or yards, and construction equipment under non-cancelable operating leases. We determine if an arrangement is a lease at inception. We have lease agreements with lease and non-lease components, which are generally accounted for separately. Operating leases are included in operating lease assets, accrued liabilities, and noncurrent operating lease liabilities on our Condensed Consolidated Balance Sheets. ​ Operating lease assets and operating lease liabilities are recognized at commencement date based on the present value of the future minimum lease payments over the lease term. In determining our lease term, we include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date to determine the present value of future payments. Lease expense from minimum lease payments is recognized on a straight-line basis over the lease term. ​ Our leases have remaining lease terms that expire at various dates through 2030, some of which may include options to extend the leases for up to 5 years. The exercise of lease extensions is at our sole discretion. Periodically, we sublease excess facility space, but any sublease income is generally not significant. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. ​ The components of lease expense are as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, | ​
​ |  | 2020 |  | 2019 | ​
Operating lease expense | ​ | $ | 22,978 | (1) | $ | 16,513 | (1)
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(1) | Includes short-term leases which are immaterial.
​ Our operating lease liabilities are reported on the Condensed Consolidated Balance Sheets as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31, | ​
​ |  | 2020 |  | 2019 | ​
Accrued liabilities | ​ | $ | 79,532 | ​ | $ | 74,036 | ​
Noncurrent operating lease liabilities, net of current portion | ​ |  | 176,546 | ​ |  | 171,225 | ​
​ | ​ | $ | 256,078 | ​ | $ | 245,261 | ​
​

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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