Schedule for Delinquent Payments for Both Principal and Interest (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Sep. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value $ 15,741 $ 7,835
Amount of Payments Past Due 30-59 Days 85 88
Amount of Payments Past Due 60-89 Days 44  
Amount of Payments Past Due > 90 Days 68  
Amount of Payments Past Due, Total 197 88
Medical
   
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value 2,982 7,019
Amount of Payments Past Due 30-59 Days   75
Amount of Payments Past Due > 90 Days 68  
Amount of Payments Past Due, Total 68 75
Office
   
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value 12,759 816
Amount of Payments Past Due 30-59 Days 85 13
Amount of Payments Past Due 60-89 Days 44  
Amount of Payments Past Due, Total $ 129 $ 13