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Fair Value Measurements (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Senior Notes [Member]
Liabilities [Abstract]
Notes, fair value	$ 412,000,000
Stated percentage (in hundredths)	6.875%
Convertible Notes payable [Member]
Liabilities [Abstract]
Notes, fair value	102,100,000
Stated percentage (in hundredths)	8.00%
Recurring [Member]
Liabilities [Abstract]
Interest rate swap	1,900,000	2,300,000
Foreign exchange forward contracts	1,300,000
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Liabilities [Abstract]
Interest rate swap	0	0
Foreign exchange forward contracts	0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Liabilities [Abstract]
Interest rate swap	1,900,000	2,300,000
Foreign exchange forward contracts	1,300,000
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities [Abstract]
Interest rate swap	0	0
Foreign exchange forward contracts	$ 0

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: 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

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X

- Definition

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

+ References

No definition available.

+ Details

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X

- Definition

Fair value as of the balance sheet date of all derivative liabilities designated as interest rate fair value hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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- Details

Name:	us-gaap_LiabilitiesAbstract
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X

- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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