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Lease Commitments | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Leases of Lessee Disclosure | Lease Commitments We incurred $11.5, $9.5, and $11.1 of rental expense under operating leases for the years ended December 31, 2017, 2016 and 2015, respectively. Certain leases contain rent escalation clauses and lease concessions that require additional rental payments in the later years of the term. Rent expense for these types of leases is recognized on a straight-line basis over the minimum lease term. In addition, we have the right, but no obligation, to renew certain leases for various renewal terms. The following table summarizes future minimum lease payments for non-cancelable operating leases as of December 31, 2017:
2018 | $ | 9.2 |
2019 | 7.1 |
2020 | 5.6 |
2021 | 4.1 |
2022 | 3.8 |
Thereafter | 10.8 |
Total future minimum lease payments | $ | 40.6 |

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- Definition The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -URI http://asc.fasb.org/topic&trid=2208923 + Details
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