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Debt (Details Textual)
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0 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | |||||||||||||||
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Mar. 17, 2015
USD ($)
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Mar. 17, 2015
EUR (€)
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Mar. 31, 2015
USD ($)
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Mar. 31, 2014
USD ($)
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Mar. 31, 2015
Interest Rate Swap
USD ($)
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Dec. 31, 2014
Interest Rate Swap
USD ($)
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Mar. 31, 2015
Term Loan Facility
USD ($)
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Oct. 04, 2013
Term Loan Facility
USD ($)
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Mar. 31, 2015
Revolving Credit Facility
USD ($)
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Dec. 31, 2014
Revolving Credit Facility
USD ($)
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Oct. 04, 2013
Revolving Credit Facility
USD ($)
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Mar. 31, 2015
Senior Credit Facility
USD ($)
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Dec. 31, 2014
Senior Credit Facility
USD ($)
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Mar. 31, 2016
Senior Credit Facility
Scenario, Forecast
USD ($)
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Dec. 31, 2015
Senior Credit Facility
Scenario, Forecast
USD ($)
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Sep. 30, 2015
Senior Credit Facility
Scenario, Forecast
USD ($)
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Jun. 30, 2015
Senior Credit Facility
Scenario, Forecast
USD ($)
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Mar. 17, 2015
2022 EUR Senior Notes
USD ($)
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Mar. 17, 2015
2022 EUR Senior Notes
EUR (€)
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| Line of Credit Facility [Line Items] | |||||||||||||||||||
| Debt Instrument, Face Amount | $ 400,000,000 | $ 500,000,000 | € 500,000,000 | ||||||||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | 1,000,000,000 | ||||||||||||||||||
| Revolving Credit Facility | 0 | 0 | |||||||||||||||||
| Letters of credit outstanding | 78,900,000 | 76,800,000 | |||||||||||||||||
| Line of Credit Facility, Current Borrowing Capacity | 921,100,000 | 923,200,000 | |||||||||||||||||
| Line of credit, commitment fee (as a percentage) | 0.175% | ||||||||||||||||||
| Payments on long-term debt | 10,000,000 | 10,000,000 | 10,000,000 | ||||||||||||||||
| Credit Facilities Scheduled Repayments Due in Next Two Quarters | 10,000,000 | 10,000,000 | |||||||||||||||||
| Credit Facilities Scheduled Repayments Due In the Fourth Quarter | 15,000,000 | ||||||||||||||||||
| Credit Facilities Scheduled Repayments Due In the First Quarter of Next Year | 15,000,000 | ||||||||||||||||||
| Derivative, notional amount | 25,000,000 | 40,000,000 | |||||||||||||||||
| Domestic subsidiaries unconditional guarantee | 100.00% | ||||||||||||||||||
| Debt Instrument, Interest Rate Terms | 0.0125 | 0.0125 | |||||||||||||||||
| Price of senior notes, stated as percentage of principal amount | 99.336% | ||||||||||||||||||
| Proceeds from Issuance of Debt | $ 523,400,000 | € 494,000,000 | |||||||||||||||||