Quarterly report pursuant to Section 13 or 15(d)

Commercial Real Estate Assets by Property Type (Details)

v3.7.0.1
Commercial Real Estate Assets by Property Type (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Commercial real estate assets $ 1,782,749 $ 1,548,603 $ 1,412,543 $ 926,377 $ 744,259 $ 660,953
Percentage of Commercial Portfolio 100.00%   100.00%      
Office Building [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Commercial real estate assets $ 939,961   $ 718,780      
Percentage of Commercial Portfolio 52.70%   50.90%      
Multifamily [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Commercial real estate assets $ 264,920   $ 260,683      
Percentage of Commercial Portfolio 14.90%   18.50%      
Retail Site [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Commercial real estate assets $ 246,710   $ 237,414      
Percentage of Commercial Portfolio 13.80%   16.80%      
Hotel [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Commercial real estate assets $ 186,854   $ 90,585      
Percentage of Commercial Portfolio 10.50%   6.40%      
Industrial Property [Member]            
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Commercial real estate assets $ 144,304   $ 105,081      
Percentage of Commercial Portfolio 8.10%   7.40%