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Investments - Schedule of Real Estate Investment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Real Estate [Line Items]    
Investment real estate, net $ 15,377 $ 15,585
Income Producing [Member]    
Real Estate [Line Items]    
Investment real estate 14,679 14,679
Less: Accumulated depreciation (1,492) (1,284)
Investment real estate, net 13,187 13,395
Non Income Producing [Member]    
Real Estate [Line Items]    
Investment real estate $ 2,190 $ 2,190