Annual report pursuant to Section 13 and 15(d)

Commercial Real Estate Assets Commercial Real Estate Loans Held-for-Investment by Internal Risk Rating (Details)

v3.3.1.900
Commercial Real Estate Assets Commercial Real Estate Loans Held-for-Investment by Internal Risk Rating (Details)
$ in Thousands
Dec. 31, 2015
USD ($)
unit
Dec. 31, 2014
USD ($)
unit
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Number of Loans, Commercial | unit 18 0    
Loans and Leases Receivable, Gross, Commercial $ 667,346 $ 0    
Commercial real estate assets $ 660,953 $ 0 $ 0 $ 0
Internal Investment Grade [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Number of Loans, Commercial | unit 18 0    
Loans and Leases Receivable, Gross, Commercial $ 667,346 $ 0    
Commercial real estate assets $ 660,953 $ 0    
Internal Noninvestment Grade [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Number of Loans, Commercial | unit 0 0    
Loans and Leases Receivable, Gross, Commercial $ 0 $ 0    
Commercial real estate assets $ 0 $ 0