Derivatives and Hedging Activities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Forward Currency Forward Contracts [Abstract]
Unrealized Gain on Foreign Currency Derivatives, before Tax	$ 2,100,000	$ 1,400,000	$ 2,100,000	$ 1,000,000
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	0.0	(1,600,000)	0	(2,100,000)
Unrealized Gain (Loss) on Price Risk Cash Flow Derivatives, before Tax	2,100,000	(200,000)	2,100,000	(1,100,000)
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	300,000	(100,000)	1,000,000	(600,000)
Foreign Currency Fair Value Hedge Asset at Fair Value	2,300,000		2,300,000		$ 600,000
Derivative, Notional Amount	263,400,000		263,400,000		194,100,000
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(16,300,000)	9,500,000	9,800,000	13,900,000
Foreign Currency Fair Value Hedge Liability at Fair Value	500,000		500,000		0
Derivative Instruments in Hedges, Assets, at Fair Value	2,300,000		2,300,000		600,000
Derivative Instruments in Hedges, Liabilities, at Fair Value	500,000		500,000		0
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	3,200,000		3,200,000		11,800,000
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	1,500,000		1,500,000		300,000
Derivative Asset	5,500,000		5,500,000		12,400,000
Derivative Liability	2,000,000		2,000,000		$ 300,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	200,000	(100,000)	700,000	(600,000)
Derivative Instruments Not Designated as Hedging Instruments, Gain	(16,300,000)	9,500,000	9,800,000	13,900,000
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ (100,000)	$ 0	$ (300,000)	$ 0