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Fair Values of Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2011
Fair Values of Financial Instruments (Tables) [Abstract]  
Carrying amounts and fair values of financial instruments
                                 
    June 30, 2011     December 31, 2010  
    Carrying             Carrying        
    Amount     Fair Value     Amount     Fair Value  
    (In thousands)  
 
                               
Assets:
                               
Cash and cash equivalents
  $ 26,702     $ 26,702     $ 21,812     $ 21,812  
Loans receivable, net
    634,472       635,077       149,263       155,377  
Marketable debt securities
    43,813       43,813       66,675       66,675  
Liabilities:
                               
Senior notes payable and other debt, gross
    4,621,374       4,593,327       2,926,954       3,055,435  
Derivative instruments
    21,655       21,655       3,722       3,722  
Contingent consideration liability
    44,200       44,200