Derivative Instruments and Hedging Activities (Details 3) In Thousands, unless otherwise specified			3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014 6 3/4% Notes	Dec. 31, 2013 6 3/4% Notes	Jun. 30, 2014 Designated Hedging Instruments 6 3/4% Notes Net investment USD ($)	Jun. 30, 2013 Designated Hedging Instruments 6 3/4% Notes Net investment USD ($)	Jun. 30, 2014 Designated Hedging Instruments 6 3/4% Notes Net investment USD ($)	Jun. 30, 2013 Designated Hedging Instruments 6 3/4% Notes Net investment USD ($)	Jun. 30, 2014 Designated Hedging Instruments 6 3/4% Notes Net investment EUR (€)	Jun. 30, 2013 Designated Hedging Instruments 6 3/4% Notes Net investment EUR (€)	Jun. 30, 2014 Derivatives Not Designated as Hedging Instruments USD ($)	Jun. 30, 2013 Derivatives Not Designated as Hedging Instruments USD ($)	Jun. 30, 2014 Derivatives Not Designated as Hedging Instruments USD ($)	Jun. 30, 2013 Derivatives Not Designated as Hedging Instruments USD ($)	Jun. 30, 2014 Derivatives Not Designated as Hedging Instruments Foreign exchange contracts Other (income) expense, net USD ($)	Jun. 30, 2013 Derivatives Not Designated as Hedging Instruments Foreign exchange contracts Other (income) expense, net USD ($)	Jun. 30, 2014 Derivatives Not Designated as Hedging Instruments Foreign exchange contracts Other (income) expense, net USD ($)	Jun. 30, 2013 Derivatives Not Designated as Hedging Instruments Foreign exchange contracts Other (income) expense, net USD ($)
Gains and losses on derivative instruments
Amount of (Gain) Loss Recognized in Income on Derivatives									$ (11,748)	$ (9,073)	$ (14,670)	$ (20,223)	$ (11,748)	$ (9,073)	$ (14,670)	$ (20,223)
Net investment hedge
Stated interest rate (as a percent)	6.75%	6.75%
Average notional amount of derivatives							58,735	105,833
Foreign exchange gains (losses)			663	(2,030)	808	2,093
Foreign exchange gains (losses), net of tax			663	(1,237)	751	1,276
Cumulative net investment hedge gains (losses) recorded in accumulated other comprehensive items, net			$ 8,235		$ 8,235