XML 97 R73.htm IDEA: XBRL DOCUMENT v3.8.0.1
Investments (Mortgage Loans by Property Type) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]        
Loans Receivable, Gross, Commercial, Real Estate $ 4,413,171 $ 3,783,207    
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 100.00% 100.00%    
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums $ (3,254) $ 0    
Allowance for Loan and Lease Losses, Real Estate (9,384) (7,685) $ (6,813) $ (6,471)
Mortgage loans on real estate 4,400,533 3,775,522    
Office Building [Member]        
Mortgage Loans on Real Estate [Line Items]        
Loans Receivable, Gross, Commercial, Real Estate $ 1,487,392 $ 1,270,113    
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 33.60% 33.60%    
Retail Site [Member]        
Mortgage Loans on Real Estate [Line Items]        
Loans Receivable, Gross, Commercial, Real Estate $ 1,270,676 $ 1,179,936    
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 28.80% 31.20%    
Industrial Property [Member]        
Mortgage Loans on Real Estate [Line Items]        
Loans Receivable, Gross, Commercial, Real Estate $ 938,612 $ 713,461    
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 21.30% 18.80%    
Apartment Building [Member]        
Mortgage Loans on Real Estate [Line Items]        
Loans Receivable, Gross, Commercial, Real Estate $ 510,052 $ 447,088    
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 11.60% 11.80%    
Other Property [Member]        
Mortgage Loans on Real Estate [Line Items]        
Loans Receivable, Gross, Commercial, Real Estate $ 206,439 $ 172,609    
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 4.70% 4.60%