SCHEDULE IV MORTGAGE LOANS ON REAL ESTATE (Detail 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at beginning of period	$ 238,674,601	$ 108,556,518	$ 100,222,734
Additions during period - Placements	11,967,892	130,191,254	20,656,391
Deductions during period - collection of principal/other	(12,021,332)	(73,171)	(12,322,607)
Balance at close of period	$ 238,621,161	$ 238,674,601	$ 108,556,518