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Litigation (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
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Commitments and Contingencies Disclosure [Abstract] |  |
Loss contingency accrual | $ 5.1 | $ 7.7
Contractual penalty | $ 14.3 |

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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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