Business Segments and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pre-Tax Income Reconciliation of Segments
Total operating income from segments	$ 72,051	$ 78,030	$ 224,100	$ 224,183
Unallocated Amount:
General and Administrative Expenses	(27,222)	(26,428)	(86,625)	(79,143)
Net Interest Expense	(20,485)	(18,954)	(58,580)	(56,810)
Loss on extinguishment of debt	(1,451)	(8,462)	(6,978)	(8,462)
Income before income taxes, equity in earnings of affiliates and discontinued operations	$ 22,893	$ 24,186	$ 71,917	$ 79,768