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Commitments and Contingencies (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) lease | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Commitments and Contingencies [Abstract] |  |  |
Number of long-term, non-cancelable operating leases | lease | 85 |  |
Rent expense | $ 33.7 | $ 37.5 | $ 35.7
Reduction of liability | $ 1.9 | $ 0.4 |

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- Definition Represents the number of long-term, non-cancelable operating leases. + References No definition available. + Details
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- Definition Reduction of the liability for losses on facilities no longer in use. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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