XML 67 R56.htm IDEA: XBRL DOCUMENT v3.10.0.1
Investments (Mortgage Loans by Method of Evaluation and Related Valuation Allowances) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Mortgage Loans:    
Total mortgage loans $ 4,794,226 $ 4,413,171
Mortgage Loans on Real Estate, Commercial and Consumer, Net, (Investment Based Operations Presentation) [Abstract]    
Mortgage loans on real estate (net of valuation allowances) 4,779,074 4,400,533
Commercial Real Estate Portfolio Segment [Member]    
Mortgage Loans:    
Evaluated individually for credit losses 30,629 5,858
Evaluated collectively for credit losses 4,763,597 4,407,313
Total mortgage loans 4,794,226 4,413,171
Valuation Allowances:    
Specific for credit losses 0 0
Non-specifically identified credit losses 10,366 9,384
Total valuation allowances $ 10,366 $ 9,384