Derivative Financial Instruments (Classification Of Gains And Losses On Interest Rate Derivative Contracts Designated As Hedging Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Derivatives, Fair Value [Line Items]
Amount of loss recognized in accumulated OCI on derivative (effective portion)	$ 716	$ 2,087	$ 1,291	$ 2,087
Amount of loss reclassified from accumulated OCI into income as "Derivative interest expense" (effective portion)	$ (2,108)	$ (4,003)	$ (4,653)	$ (8,683)