Commitments And Contingencies (Departure Of Executive Officers) (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Sep. 30, 2014
May 11, 2015
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Dec. 31, 2014
Commitments And Contingencies [Line Items]          
Severance benefits $ 23,800,000 $ 11,000,000      
Restricted stock units vested 37,392        
Accounts payable, accrued expenses and other liabilities 134,462,000       126,971,000
Employee Severance [Member]          
Commitments And Contingencies [Line Items]          
Accounts payable, accrued expenses and other liabilities 11,600,000       11,600,000
Messr Lefkowitz [Member]          
Commitments And Contingencies [Line Items]          
Severance benefits 3,400,000        
Stock options vested 11,457        
Restricted stock units vested 68,667        
Period for continuation of health insurance 48 months        
Messr Thomas [Member]          
Commitments And Contingencies [Line Items]          
Severance benefits 3,100,000        
Stock options vested 33,605        
Restricted stock units vested 41,000        
Period for continuation of health insurance 48 months        
Consulting payment     300,000    
Scenario, Forecast [Member] | Messr Hersh [Member]          
Commitments And Contingencies [Line Items]          
Severance benefits       8,000,000  
Restricted stock units vested       210,000  
Period for continuation of health insurance       48 months  
Cash payment       504,000  
Termination payment multiplier       210,000  
Shares issued       41,811  
Deferred retirement compensation contribution       $ 2,311,792  
Total Stockholder Return Based Awards [Member]          
Commitments And Contingencies [Line Items]          
Restricted stock units vested 357        
Shares issued 45,062        
Total Stockholder Return Based Awards [Member] | Scenario, Forecast [Member]          
Commitments And Contingencies [Line Items]          
Restricted stock units vested       675  
Shares issued       41,811  
Total Stockholder Return Based Awards [Member] | Scenario, Forecast [Member] | Messr Hersh [Member]          
Commitments And Contingencies [Line Items]          
Restricted stock units vested       675