Derivative Financial Instruments Derivative Financial Instruments Narrative (Details) (USD $)			9 Months Ended												9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Forward Contracts [Member]	Sep. 30, 2014 Secured Debt [Member]	Dec. 31, 2013 Secured Debt [Member]	Sep. 30, 2014 Interest Rate Swap [Member] contracts	Sep. 30, 2014 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Minimum [Member]	Sep. 30, 2014 Foreign Exchange Contract [Member] Not Designated as Hedging Instrument [Member] Maximum [Member]	Sep. 30, 2014 Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]	Dec. 31, 2013 Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]	Sep. 30, 2013 Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]	Dec. 31, 2012 Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]	Sep. 30, 2014 Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member] Net Investment Hedging [Member]	Sep. 30, 2013 Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member] Net Investment Hedging [Member]	Sep. 30, 2014 Number of Counterparties [Member]
Net unrealized loss on hedging instruments	$ 81,725,000	$ 21,722,000							$ 14,380,000	$ 14,380,000	$ 14,380,000	$ 14,380,000	$ 14,400,000	$ 14,400,000
Description of Derivative Activity Volume			a total of 390 contracts were entered into												Our derivative assets and liabilities consist of foreign exchange forward and interest rate swap contracts with eight counterparties at September 30, 2014 and seven counterparties at December 31, 2013
Number of Interest Rate Derivatives Held						6
Derivative, Notional Amount						200,000,000	86,000	19,300,000
Pay fixed interest rate in interst rate swap						1.00%
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net						(1,500,000)
Long-term Debt				$ 310,000,000	$ 378,750,000