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	Jun. 30, 2012	Dec. 31, 2011
Derivative Financial Instruments [Line Items]
Liability Derivatives	$ 1,042	$ 1,325
Interest rate swap agreements [Member] | Other liabilities [Member]
Derivative Financial Instruments [Line Items]
Liability Derivatives	399	670
Equity contracts [Member] | Other liabilities [Member]
Derivative Financial Instruments [Line Items]
Liability Derivatives	$ 643	$ 655