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Divestiture (Details) € in Thousands, $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |
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Sep. 30, 2015 | Dec. 31, 2013 EUR (€) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Jul. 31, 2015 EUR (€) | Jul. 31, 2015 USD ($) | Jul. 31, 2014 EUR (€) | Jul. 31, 2014 USD ($) | Jul. 31, 2013 EUR (€) | Jul. 31, 2013 USD ($) | Jul. 31, 2012 EUR (€) | Jul. 31, 2012 USD ($)
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Date of divestiture | Jul. 31, 2012 |  |  |  |  |  |  |  |  |  |  |
Cash received as part of the selling price |  |  |  |  |  |  |  |  |  |  | € 815 | $ 1,014
Amount financed as part of selling price |  |  |  |  |  |  |  |  |  |  | 5,351 |
Total selling price |  |  |  |  |  |  |  |  |  |  | € 6,166 |
Total amount of installment payments received quarterly in 2013 |  | € 2,126 | $ 2,826 |  |  |  |  |  |  |  |  |
Total amount of first anniversary payment received |  |  |  |  |  |  |  |  | € 1,075 | $ 1,435 |  |
Total amount of second anniversary payment received |  |  |  |  |  |  | € 1,075 | $ 1,418 |  |  |  |
Total amount of third and final anniversary payment received |  |  |  |  | € 1,075 | $ 1,188 |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain on Disposal | $ |  |  |  | $ 784 |  |  |  |  |  |  |  |

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- Definition The total amount of quarterly installment payments received during 2013 as part of these business divestitures. + References No definition available. + Details
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- Definition The total amount of first anniversary payment received as part of this business divestiture. + References No definition available. + Details
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- Definition The cash inflow associated with the divestment of businesses during the period. The cash portion only of the selling price. + References No definition available. + Details
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- Definition The total amount of third and final anniversary payment received as part of this business divestiture. + References No definition available. + Details
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- Definition Date the entity disposed of a business or a group of assets, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Amount of operating income or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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