Debt and Capital Lease Obligations - Senior Notes (Details) - 4.625% Senior Notes € in Millions, $ in Millions	6 Months Ended
Jun. 30, 2015 USD ($)	Mar. 25, 2015 EUR (€)
Debt and capital lease obligations
Face amount \| €		€ 503.8
Unamortized discount	$ 4.1	€ 3.8
Payments of debt issuance costs	5.0
Debt issuance costs accrued	$ 0.4
Maturity date	Apr. 15, 2022
Covenant, maximum lifetime payment, fixed portion	$ 100.0
Covenant, maximum lifetime payment, amount based on net income (as percentage)	50.00%
Prior to April 15, 2018 with net proceeds from equity offering
Debt and capital lease obligations
Redemption price (as percentage)	104.625%
Amount of principal subject to redemption price (as percentage)	35.00%
Beginning on April 15, 2018
Debt and capital lease obligations
Redemption price (as percentage)	102.3125%
Beginning on April 15, 2019
Debt and capital lease obligations
Redemption price (as percentage)	101.1563%
Beginning on April 15, 2020
Debt and capital lease obligations
Redemption price (as percentage)	100.00%
Upon a change in control
Debt and capital lease obligations
Redemption price (as percentage)	101.00%

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

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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The cash outflow for loan and debt issuance costs.

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