Debt (Details)	3 Months Ended				3 Months Ended		3 Months Ended
	Mar. 31, 2013 USD ($)	Mar. 31, 2012	Mar. 31, 2013 Term A Facility [Member] USD ($)	Aug. 02, 2011 Term A Facility [Member] USD ($)	Mar. 31, 2013 Dollar Term B Facility [Member] USD ($)	Aug. 02, 2011 Dollar Term B Facility [Member] USD ($)	Mar. 31, 2013 Euro Term B Facility [Member] USD ($)	Aug. 02, 2011 Euro Term B Facility [Member] EUR (€)	Aug. 02, 2011 Revolving Credit Facility [Member] USD ($)	Aug. 02, 2011 Revolving Credit Facility Denominated In Euros [Member] USD ($)	Mar. 31, 2013 Federal Funds Rate Plus [Member]	Mar. 31, 2013 LIBOR Plus [Member]	Mar. 31, 2013 Base Rate Loans [Member] Minimum [Member]	Mar. 31, 2013 Base Rate Loans [Member] Maximum [Member]	Mar. 31, 2013 LIBOR Loans [Member] Minimum [Member]	Mar. 31, 2013 LIBOR Loans [Member] Maximum [Member]	Mar. 31, 2013 Term B Facility [Member]
Line of Credit Facility [Line Items]
Senior secured credit facility				$ 100,000,000		$ 350,000,000		€ 175,000,000
Undrawn revolving credit facility									200,000,000	100,000,000
Line of Credit Facility, Decrease, Repayments					345,600,000		27,200,000
Line of Credit Facility, Amount Outstanding			92,500,000
Percentage of lien on the shares of first-tier foreign subsidiaries	65.00%
Percentage of pledge of voting capital stock subject to certain exceptions	100.00%
Percentage of interest rate for base rate loans							4.75%				0.50%	1.00%	2.75%	3.25%	3.75%	4.25%	1.50%
Weighted average interest rate for the outstanding borrowings	5.18%	5.67%
Write off of Deferred Debt Issuance Cost							10,300,000
Line of Credit Facility, Covenant Terms, Capital Expenditures, Annual Limit for Current Fiscal Year1	90,000,000
Line Of Credit Facility Covenant Terms Capital Expenditures Annual Limit Carryover1	59,000,000
Line of Credit Facility, Covenant Compliance, Capital Expenditures, Amount Incurred to Date	$ 14,400,000