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Segments (Details 1) (USD $)
In Thousands
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Reconciliation of net income to Adjusted EBITDA    
Net income$ 47,648$ 33,883$ 113,979$ 111,353
Add (deduct):    
Income taxes29,33715,87761,64645,918
Interest expense32,24928,93891,31683,553
Loss on early retirement of debt  4,945 
Other (income) expense(2,816)(647)(8,289)(5)
Depreciation and amortization40,39434,805119,124103,395
Impairment of long-lived assets9921,0223,6016,057
Loss on sale of assets and other1,8097,5487,97511,906
Deferred lease expenses1,2601,0792,9102,776
Amortization of long-term prepaid rents6924681,9761,247
Share based awards compensation expense2,5601,9257,1325,179
Adjusted EBITDA$ 154,273$ 125,077$ 406,770$ 371,974