Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) (Interest Rate Swap Agreements [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCL on Derivative
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCL into Income	$ 41	$ 41