Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Call Rights (Details)

v3.10.0.1
INVESTMENTS IN RESIDENTIAL MORTGAGE LOANS - Call Rights (Details) - Residential Mortgage Loans
$ in Millions
1 Months Ended
May 31, 2018
USD ($)
trust
Jan. 31, 2018
USD ($)
trust
Jun. 30, 2018
USD ($)
trust
Apr. 30, 2018
USD ($)
trust
Mar. 31, 2018
USD ($)
trust
Investment [Line Items]          
Number of Trusts Called | trust 12   12 8 25
Previously acquired loans $ 33.5        
Call Right, Batch 1          
Investment [Line Items]          
Number of Trusts Called | trust   0      
Call Right, Batch 2          
Investment [Line Items]          
Number of Trusts Called | trust   7      
Securities Owned Prior          
Investment [Line Items]          
Face Amount 6.7   $ 32.3 $ 5.8 $ 85.9
Amortized Cost Basis 4.7   19.4 4.8 75.4
Securities Owned Prior | Call Right, Batch 1          
Investment [Line Items]          
Face Amount   $ 0.0      
Amortized Cost Basis   0.0      
Securities Owned Prior | Call Right, Batch 2          
Investment [Line Items]          
Face Amount   0.4      
Amortized Cost Basis   0.2      
Assets Acquired          
Investment [Line Items]          
Unpaid Principal Balance 475.6   409.0 218.8 458.8
Loan Price 473.5   400.6 222.3 461.4
REO & Other Price 3.2   $ 3.6 $ 2.0 $ 4.1
Assets Acquired | Call Right, Batch 1          
Investment [Line Items]          
Unpaid Principal Balance   0.0      
Loan Price   0.0      
REO & Other Price   0.0      
Assets Acquired | Call Right, Batch 2          
Investment [Line Items]          
Unpaid Principal Balance   32.5      
Loan Price   32.8      
REO & Other Price   0.1      
Loans Sold | Call Right, Batch 1          
Investment [Line Items]          
Unpaid Principal Balance 435.3 726.5      
Loans Sold, Gain (Loss) (6.7) (17.8)      
Retained Bonds | Call Right, Batch 1          
Investment [Line Items]          
Restricted Bonds, Basis 52.9 76.8      
Retained Assets | Call Right, Batch 1          
Investment [Line Items]          
Unpaid Principal Balance 56.0 265.3      
Loan Price 46.8 239.0      
REO & Other Price $ 4.6 $ 14.4