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Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Debt
Total debt	$ 693,532		$ 693,532		$ 463,711
Short-term debt	14,940		14,940		14,647
Long term-debt	678,592		678,592		449,064
Interest expense and other financing costs, net
Interest income	1,482	501	3,134	925
Interest expense and other financing costs	(6,167)	(5,080)	(12,175)	(9,163)
Interest expense and other financing costs, net	(4,685)	(4,579)	(9,041)	(8,238)
Credit facility
Debt
Total debt	425,000		425,000		200,000
Term Loans
Debt
Total debt	242,500		242,500		242,500
Capital leases
Debt
Total debt	14,495		14,495		3,158
Acquisition promissory notes
Debt
Total debt	6,302		6,302		13,403
Other
Debt
Total debt	$ 5,235		$ 5,235		$ 4,650

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

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

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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.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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