Basis of Presentation and Significant Accounting Policies Consolidation and Basis of Presentation (Details) shares in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2017
shares
| |
| Basis of Presentation and Significant Accounting Policies [Abstract] | |
| Reverse stock split, conversion ratio | 0.50 |
| Number of shares of common stock of Granite Point Mortgage Trust Inc. distributed via special dividend (in shares) | 33.1 |
| X | ||||||||||
- Definition Basis of Presentation and Significant Accounting Policies [Abstract] No definition available.
|
| X | ||||||||||
- Definition Special dividend distributed to shareholders during the period. No definition available.
|
| X | ||||||||||
- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|