Derivative Financial Instruments (Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets) (Details) (Non-hedging derivatives [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Derivative Financial Instruments [Line Items]
Asset Derivatives	$ 1	$ 0
Liability Derivatives	(431)	(1,325)
Interest rate swap agreements [Member] | Other liabilities [Member]
Derivative Financial Instruments [Line Items]
Asset Derivatives	0	0
Liability Derivatives	(260)	(670)
Equity contracts [Member] | Other liabilities [Member]
Derivative Financial Instruments [Line Items]
Asset Derivatives		0
Liability Derivatives	(171)	(655)
Equity contracts [Member] | Short-term investments [Member]
Derivative Financial Instruments [Line Items]
Asset Derivatives	$ 1