Annual report pursuant to Section 13 and 15(d)

Operating Leases (Details)

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Operating Leases (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Gross minimum future rentals  
2012 $ 377,917
2013 335,816
2014 291,088
2015 237,279
2016 180,345
Thereafter 502,663
Total $ 1,925,108