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Commercial Mortgage Loan - Carrying Value of the Commercial Mortgage Loan (Detail) (USD $)
Dec. 31, 2013
Loans And Leases Receivable [Line Items]  
Total Commercial Mortgage Loan $ 18,845,053
Commercial Mortgage Loan [Member]
 
Loans And Leases Receivable [Line Items]  
Current Face Amount 19,465,000
Unamortized Fees 29,711
Unaccreted Purchase Discount (649,658)
Total Commercial Mortgage Loan $ 18,845,053