Quarterly report pursuant to Section 13 or 15(d)

Equity Noncontrolling Interest (Details)

v3.7.0.1
Equity Noncontrolling Interest (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Jun. 30, 2017
USD ($)
$ / shares
shares
Equity [Abstract]  
Shares of Granite Point Mortgage Trust Inc. common stock owned (in shares) | shares 33,100,000
Ownership percentage in Granite Point Mortgage Trust Inc. 76.50%
Shares issued by Granite Point Mortgage Trust Inc. in initial public offering (in shares) | shares 10,000,000
Price per share issued by Granite Point Mortgage Trust Inc. in initial public offering (in usd per share) | $ / shares $ 19.50
Gross proceeds received by Granite Point Mortgage Trust Inc. in initial public offering $ 181,900
Net proceeds received by Granite Point Mortgage Trust Inc. in initial public offering 195,000
Issuance costs incurred by Granite Point Mortgage Trust Inc. in initial public offering 13,100
Maximum amount of Granite Point Mortgage Trust Inc. share value that may be purchased by Two Harbors Investment Corp. $ 20,000