Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations (Details)

v3.8.0.1
Discontinued Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended
Nov. 01, 2017
Mar. 31, 2018
Mar. 31, 2017
Jun. 28, 2017
Discontinued Operations [Abstract]        
Shares of Granite Point Mortgage Trust Inc. common stock received in exchange for contribution (in shares)       33,100,000
Ownership percentage in Granite Point Mortgage Trust Inc.       76.50%
Number of shares of common stock of Granite Point Mortgage Trust Inc distributed via special dividend (in shares) 33,100,000      
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]        
Commercial real estate assets $ 2,233,080      
Available-for-sale securities, at fair value 12,814      
Cash and cash equivalents 84,183      
Restricted cash 2,838      
Accrued interest receivable 6,588      
Other assets 22,774      
Total Assets 2,362,277      
Repurchase agreements 1,516,294      
Dividends payable 48      
Other liabilities 10,337      
Total Liabilities $ 1,526,679      
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]        
Commercial real estate assets   $ 0 $ 23,570  
Available-for-sale securities   0 246  
Other   0 2  
Total interest income   0 23,818  
Interest expense   0 6,106  
Net interest income   0 17,712  
Management fees   0 1,662  
Servicing expenses   0 322  
Other operating expenses   0 2,273  
Total expenses   0 4,257  
Income from discontinued operations before income taxes   0 13,455  
(Benefit from) provision for income taxes   0 1  
Income from discontinued operations attributable to common stockholders   $ 0 $ 13,454