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Derivatives Derivative Instruments (Details) € in Millions, $ in Millions	Jan. 20, 2017 USD ($)	Jan. 20, 2017 EUR (€)
Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Notional Amount	$ 100.0	€ 93.7
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%
First Amendment to Second Amended and Restated Credit Agreement [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Term of Contract	3 years
Derivative, Notional Amount	$ 315.0
Derivative, Fixed Interest Rate	1.65%	1.65%

X

- 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

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: