Annual report pursuant to Section 13 and 15(d)

Commercial Real Estate Loans Assets by Internal Risk Rating (Details)

v3.6.0.2
Commercial Real Estate Loans Assets by Internal Risk Rating (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
unit
Dec. 31, 2015
USD ($)
unit
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of Instruments, Commercial Real Estate Assets | unit 36 18    
Commercial real estate assets     $ 535,712 $ 544,581
Commercial Real Estate Assets [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of Instruments, Commercial Real Estate Assets | unit 36 18    
Commercial Real Estate Loans Held-for-Investment, Unpaid Principal $ 1,424,445 $ 667,346    
Commercial real estate assets $ 1,412,543 $ 660,953    
Commercial Real Estate Assets [Member] | Internal Investment Grade [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of Instruments, Commercial Real Estate Assets | unit 36 18    
Commercial Real Estate Loans Held-for-Investment, Unpaid Principal $ 1,424,445 $ 667,346    
Commercial real estate assets $ 1,412,543 $ 660,953    
Commercial Real Estate Assets [Member] | Internal Noninvestment Grade [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Number of Instruments, Commercial Real Estate Assets | unit 0 0    
Commercial Real Estate Loans Held-for-Investment, Unpaid Principal $ 0 $ 0    
Commercial real estate assets $ 0 $ 0