Indebtedness (Schedule Of Aggregate Maturities Of Company's Indebtedness) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Debt Instrument [Line Items]
Remainder of 2012	$ 1,153
2013	186,606
2014	3,961
2015	124,205
2016	4,419	[1]
Thereafter	716,148
Total aggregate maturities of indebtedness	1,036,492		970,443
Line of credit, outstanding balance	$ 0

[1] Includes outstanding balances on lines of credit totaling $0.