Derivative Financial Instruments (Schedule Of Contracts Designated As Hedged Instruments) (Details) € in Thousands, £ in Thousands, SFr in Thousands, CAD in Thousands |
3 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2016
GBP (£)
|
Dec. 31, 2015
GBP (£)
|
Mar. 31, 2016
EUR (€)
|
Mar. 31, 2016
CHF (SFr)
|
Mar. 31, 2016
CAD
|
Dec. 31, 2015
EUR (€)
|
Dec. 31, 2015
CHF (SFr)
|
Dec. 31, 2015
CAD
|
|
| Canadian Dollars [Member] | ||||||||
| Foreign Exchange Contracts [Line Items] | ||||||||
| Foreign exchange contracts, Notional Amount | CAD | CAD 8,129 | CAD 1,302 | ||||||
| Derivative, Maturity Date | Feb. 01, 2017 | Feb. 01, 2016 | ||||||
| British Pounds [Member] | ||||||||
| Foreign Exchange Contracts [Line Items] | ||||||||
| Foreign exchange contracts, Notional Amount | £ | £ 1,600 | £ 2,047 | ||||||
| Derivative, Maturity Date | Feb. 01, 2017 | Feb. 01, 2017 | ||||||
| Euro [Member] | ||||||||
| Foreign Exchange Contracts [Line Items] | ||||||||
| Foreign exchange contracts, Notional Amount | € | € 13,727 | € 13,295 | ||||||
| Derivative, Maturity Date | Feb. 01, 2017 | Feb. 01, 2017 | ||||||
| Swiss Francs [Member] | ||||||||
| Foreign Exchange Contracts [Line Items] | ||||||||
| Foreign exchange contracts, Notional Amount | SFr | SFr 17,200 | SFr 17,738 | ||||||
| Derivative, Maturity Date | Feb. 01, 2017 | Feb. 01, 2017 | ||||||