International Retirement Plan (Schedule Of Accumulated And Projected Benefit Obligations) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 7,062	$ 5,861
International Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	7,194	5,987	5,240
Accumulated benefit obligation	$ 6,301	$ 5,553