Derivative Financial Instruments (Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets) (Details) (Derivatives Not Designated As Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Derivative Financial Instruments [Line Items]
Total derivatives	$ 951	$ 1,325
Interest Rate Swap Agreements [Member] | Other Liabilities [Member]
Derivative Financial Instruments [Line Items]
Total derivatives	546	670
Equity Contracts [Member] | Other Liabilities [Member]
Derivative Financial Instruments [Line Items]
Total derivatives	$ 405	$ 655