Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments And Hedging Strategies (Fair Values Of Derivative Instruments) (Details)

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Derivative Instruments And Hedging Strategies (Fair Values Of Derivative Instruments) (Details)
$ in Thousands
Jun. 30, 2017
USD ($)
Derivative [Line Items]  
Derivative Asset, Fair Value, Gross Asset $ 225
Derivative Liability 27,732
Foreign currency exchange, option and future contracts  
Derivative [Line Items]  
Derivative Asset, Fair Value, Gross Asset 0
Derivative Liability 27
Interest rate swap agreements  
Derivative [Line Items]  
Derivative Asset, Fair Value, Gross Asset 74
Derivative Liability 30
Not Designated as Hedging Instrument [Member] | Foreign currency exchange, option and future contracts  
Derivative [Line Items]  
Derivative Asset, Fair Value, Gross Asset 151
Derivative Liability 0
Not Designated as Hedging Instrument [Member] | Interest rate swap agreements  
Derivative [Line Items]  
Derivative Asset, Fair Value, Gross Asset 0
Derivative Liability 566
Not Designated as Hedging Instrument [Member] | Options On Equities And Equity Indices [Member]  
Derivative [Line Items]  
Derivative Liability $ 27,109
Three Point Seven Five Percentage Convertible Notes [Member]  
Derivative [Line Items]  
Debt Instrument, Interest Rate, Stated Percentage 3.75%
Three Point Seven Five Percentage Convertible Notes [Member] | Not Designated as Hedging Instrument [Member]  
Derivative [Line Items]  
Derivative Asset, Fair Value, Gross Asset $ 0