Employee Benefit Plans (Schedule Of Amounts Recognized On The Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of period	$ 199,117	$ 178,618
Interest cost	4,815	5,016	$ 6,113
Benefits paid	(8,045)	(5,644)
Actuarial loss	(15,853)	4,985
Effect of foreign currency rate changes	(8,537)	16,142
Projected benefit obligation at end of year	171,497	199,117	178,618
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of period	206,570	175,644
Actual gain on plan assets	(5,683)	16,902
Employer contributions	3,368	3,393
Benefits paid	(8,045)	(5,644)
Effect of foreign currency rate changes	(9,246)	16,275
Fair value of plan assets at end of year	186,964	206,570	$ 175,644
Funded status of the plan	15,467	7,453
Net actuarial pension loss	$ 74,604	$ 77,567