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Other Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2017
Other Commitments and Contingencies [Abstract] |
Other Commitments And Contingencies | 11 Other Commitments and Contingencies Lease agreements, expiring at various dates through 20 31, cover buildings, office equipment and automobiles. Rental expense was $27 million, $28 million and $27 million for the years ended December 31, 2017, 2016 and 2015, respectively. Future minimum ren ts payable as of December 31, 2017 under non-cancelable leases with initial terms exceeding one year are as follows (in thousands):
2018 |  | $ | 23,168
2019 |  |  | 18,228
2020 |  |  | 14,122
2021 |  |  | 8,652
2022 and thereafter |  |  | 25,512
Total |  | $ | 89,682
The Company licenses certain technology and software from third parties. Future minimum license fees payable under existing license agreements as of December 31, 2017 are immaterial for the years ended December 31, 2018 and thereafter. The Company enters into licensing arrangements with third parties that require future milestone or royalty payments contingent upon future events. Upon the achievement of certain milestones in existing agreements, the Company could make additional future payment s of up to $7 million, as well as royalties on future net sales. The Company enters into standard indemnification agreements in its ordinary course of business. Pursuant to these agreements, the Company inde mnifies, holds harmless and agrees to reimburse the indemnified party for losses suffered or incurred by the indemnified party, generally the Company’s business partners or customers, in connection with patent, copyright or other intellectual property infr ingement claims by any third party with respect to its current products, as well as claims relating to property damage or personal injury resulting from the performance of services by the Company or its subcontractors. The maximum potential amount of futur e payments the Company could be required to make under these indemnification agreements is unlimited. Historically, the Company’s costs to defend lawsuits or settle claims relating to such indemnity agreements have been minimal and management accordingly b elieves the estimated fair value of these agreements is immaterial.

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- Definition The entire disclosure for commitments and contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -URI http://asc.fasb.org/topic&trid=2127136 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -URI http://asc.fasb.org/topic&trid=2144648 + Details
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