Organization and Operations (Details) shares in Millions |
Jun. 30, 2017
shares
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| Organization and Operations [Abstract] | |
| Shares of Granite Point Mortgage Trust Inc. common stock owned (in shares) | 33.1 |
| Ownership percentage in Granite Point Mortgage Trust Inc. | 76.50% |
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- Definition Organization and Operations [Abstract] No definition available.
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- Definition Balance held at close of period in number of shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available.
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