Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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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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Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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- Details

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Long-Term Debt (Senior Notes) (Details)					12 Months Ended
Long-Term Debt (Senior Notes) (Details)	Sep. 11, 2017 USD ($)	Jan. 15, 2016 USD ($)	Jun. 09, 2015 USD ($)	Jan. 31, 2013 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 11, 2017 EUR (€)	Jun. 09, 2015 EUR (€)	Dec. 31, 2014 USD ($)	Jan. 17, 2006 USD ($)
Debt Instrument [Line Items]
Debt issuance costs					$ 1,478,000	$ 1,336,000	$ 0
Floating Rate Notes, payable September 11, 2019, interest payable quarterly
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €								€ 300,000,000
Debt issuance costs	$ 911,000
2.00% senior notes, payable January 14, 2022; interest payable annually
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €									€ 500,000,000
Debt issuance costs			$ 4,218,000
Interest rate percentage									2.00%
3.85% senior notes, payable February 1, 2023; interest payable semiannually
Debt Instrument [Line Items]
Aggregate principal amount of debts				$ 600,000,000
Debt issuance costs				$ 6,000,000
Interest rate percentage				3.85%
6.125% notes, payable January 15, 2016; interest payable semiannually
Debt Instrument [Line Items]
Aggregate principal amount of debts											$ 900,000,000
Interest rate percentage											6.125%
Amount of debt repurchased										$ 254,445,000
Remaining principal paid in period		$ 645,555,000
Euro Interbank Offered Rate (EURIBOR) \| Minimum \| Floating Rate Notes, payable September 11, 2019, interest payable quarterly
Debt Instrument [Line Items]
Basis spread on debt instrument	0.30%