Derivative Instruments (Impact of Derivative Instruments on the Consolidated Statements of Comprehensive Income) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Loss (gain) on derivatives and financial instruments, net	$ 4,016,000	$ (2,284,000)	$ 2,448,000
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)		(2,476,000)	7,871,000
Foreign Exchange Option [Member]
Derivative [Line Items]
Loss (gain) on derivatives and financial instruments, net		(49,000)	673,000
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings	0
Gain (loss) recognized in OCI	211,390,000
Foreign Currency Translation Adjustment Portion Attributable To Parent 2		0	(2,516,000)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		$ (252,168,000)	$ 357,021,000
Designated as Hedging Instrument
Derivative [Line Items]
Gain (loss) on forward exchange contracts recognized in income.	12,271,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Gain (loss) on forward exchange contracts recognized in income.	$ 5,233,000