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Prepaid Expenses And Other Assets (Schedule Of Prepaid Expenses, Deferred Costs, And Other Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Prepaid Expense And Other Assets [Abstract]    
Prepaid expense, Current $ 8,806 $ 7,696
Interest rate swaps, Current 606 834
Deferred costs and other current assets, Current 3,644 1,692
Total, Current 13,056 10,222
Prepaid expenses, Noncurrent 2,639 576
Deferred costs, Noncurrent 1,822 2,619
Other, Noncurrent 16,313 624
Total, Noncurrent $ 20,774 $ 3,819