Annual report pursuant to Section 13 and 15(d)

Fair Value, Option, Quantitative Disclosures (Details)

v3.19.1
Fair Value, Option, Quantitative Disclosures (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income $ 42,996 $ 24,430
Change in fair value due to credit risk 0 0
Residential mortgage loans held-for-investment in securitization trusts    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 148,161 114,252
Change in fair value due to credit risk 0 0
Collateralized borrowings in securitization trusts    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income (105,165) (89,822)
Change in fair value due to credit risk 0 0
Interest Income [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 20,313 36,264
Interest Income [Member] | Residential mortgage loans held-for-investment in securitization trusts    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 102,886 133,993
Interest Expense [Member] | Collateralized borrowings in securitization trusts    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income (82,573) (97,729)
Other Income (Loss) [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 22,683 (11,834)
Other Income (Loss) [Member] | Residential mortgage loans held-for-investment in securitization trusts    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 45,275 (19,741)
Other Income (Loss) [Member] | Collateralized borrowings in securitization trusts    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income $ (22,592) $ 7,907