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Schedule IV - Mortgage Loans on Real Estate (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Mortgage Loans on Real Estate [Abstract]      
Mortgage Loans on Real Estate $ 658,583 [1] $ 389,167 $ 258,092
[1] The aggregate cost for federal income tax purposes is $658,583.