Debt (Schedule of Debt) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt including capital lease obligations
Senior notes	$ 498,247	$ 498,124
Term Loan Facility	380,000	395,000
Revolving Credit Facility	196,000	0
Capital lease obligations and other borrowings	33,911	35,470
Debt and capital lease obligations	1,108,158	928,594
Less amounts due within one year	268,934	59,478
Total debt due after one year	$ 839,224	$ 869,116
Senior Notes [Member]
Debt including capital lease obligations
Stated interest rate (as a percent)	3.50%	3.50%
Term Loan Facility [Member]
Debt including capital lease obligations
Effective interest rate (as a percent)	1.50%	1.81%
Revolving Credit Facility [Member]
Debt including capital lease obligations
Effective interest rate (as a percent)	1.49%