Income Taxes (Schedule of Income Tax Rate Reconciliation) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory rate	35.00%	35.00%	35.00%	35.00%
Foreign provision	(12.30%)	(6.30%)	(11.80%)	(30.80%)
Tax return to accrual adjustment	(4.00%)	(2.80%)	(2.30%)	(1.10%)
Change in U.K. tax rate	(5.60%)	(12.80%)	(3.30%)	(5.20%)
Other	0.40%	(2.90%)	0.10%	(2.50%)
Effective tax rate	13.50%	10.20%	17.70%	(4.60%)