Quarterly report pursuant to Section 13 or 15(d)

Schedule of Fair Value of Derivatives (Details)

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Schedule of Fair Value of Derivatives (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Derivatives interest rate caps treated as hedges
   
Fair Value of Derivatives $ 504 $ 1,092
Fair Value of Derivatives, Balance Sheet Location Derivative Assets Derivative Assets
Derivatives interest rate caps not treated as hedges
   
Fair Value of Derivatives 462 862
Fair Value of Derivatives, Balance Sheet Location Derivative Assets Derivative Assets
Total Derivatives
   
Fair Value of Derivatives 966 1,954
Derivatives interest rate swaps treated as hedges
   
Fair Value of Derivatives 70,226 90,025
Fair Value of Derivatives, Balance Sheet Location Derivative Liabilities Derivative Liabilities
Derivatives interest rate swap agreements not treated as hedges
   
Fair Value of Derivatives 31,583 29,295
Fair Value of Derivatives, Balance Sheet Location Derivative Liabilities Derivative Liabilities
Derivatives total liabilities
   
Fair Value of Derivatives $ 101,809 $ 119,320