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Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Debt
Total debt	$ 767,275		$ 767,275		$ 463,711
Short-term debt	16,390		16,390		14,647
Long term-debt	750,885		750,885		449,064
Interest expense and other financing costs, net
Interest income	1,328	1,432	4,462	2,357
Interest expense and other financing costs	(10,113)	(6,012)	(22,288)	(15,175)
Interest expense and other financing costs, net	(8,785)	(4,580)	(17,826)	(12,818)
Credit facility
Debt
Total debt	495,000		495,000		200,000
Term Loans
Debt
Total debt	242,500		242,500		242,500
Acquisition promissory notes
Debt
Total debt	12,635		12,635		13,403
Other
Debt
Total debt	$ 17,140		$ 17,140		$ 7,808

X

- Definition

Represents the amount of interest income and expense, net, which includes other financing costs.

+ References

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- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

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- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

+ References

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

-Publisher FASB

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-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391



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Amount of interest income earned from interest bearing assets not separately disclosed.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

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-Subparagraph (SX 210.5-02.22)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

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-Section H

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