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Derivatives Derivative Instruments (Details) | Jan. 20, 2017 EUR (€) | Jan. 20, 2017 USD ($)
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Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount |  | $ 315,000,000
Derivative, Term of Contract | 3 years |
Derivative, Fixed Interest Rate | (1.65%) | (1.65%)
Cross Currency Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | € 93,700,000.0 | $ 100,000,000
Derivative, Term of Contract | 3 years |
Cross Currency Interest Rate Contract [Member] | Long [Member] |  |
Derivative [Line Items] |  |
Derivative, Fixed Interest Rate | (1.65%) | (1.65%)
Cross Currency Interest Rate Contract [Member] | Short [Member] |  |
Derivative [Line Items] |  |
Derivative, Fixed Interest Rate | (0.18%) | (0.18%)

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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- Details
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- Details
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- Details
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