Summary Of Significant Accounting Policies (Summary Of Gains And Losses Recorded In Interest Expense And Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary Of Significant Accounting Policies [Abstract]
Loss reclassified from accumulated other comprehensive income			$ 1,899
Loss from changes in the fair value of the interest rate swap			170
Total loss included in interest expense			2,069
Realized loss reclassified to interest expense, net of taxes			302
Unrealized loss reclassified to interest expense, net of taxes			904
Gain included in other comprehensive income			$ 1,206