Changes In Accumulated Other Comprehensive Income (Reclassifications Out Of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Expense	$ (3,109)	$ (2,144)	$ (7,387)	$ (7,152)
Other revenues	522	588	1,616	1,815
Total before tax	1,844	(1,302)	(2,063)	(9,637)
Tax (expense) or benefit	18	(396)	68	(120)
Net of tax	2,222	(1,782)	(1,290)	(10,422)
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	2,189		854
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Gains And Losses On Derivatives Fair Value [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	2,495		1,781
Tax (expense) or benefit
Net of tax	2,495		1,781
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Defined Benefit Pension Items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service costs	(25)		(75)
Actuarial losses	(281)		(852)
Total before tax	(306)		(927)
Net of tax	(306)		(927)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Interest Rate Contract [Member] | Gains And Losses On Derivatives Fair Value [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Expense	2,444		1,795
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Foreign Exchange Contracts [Member] | Gains And Losses On Derivatives Fair Value [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other revenues	$ 51		$ (14)