| Document and Entity Information | May 10, 2021 |
| Entity Listings [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 10, 2021 |
| Entity Registrant Name | Cherry Hill Mortgage Investment Corporation |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 001-36099 |
| Entity Tax Identification Number | 46-1315605 |
| Entity Address, Address Line One | 1451 ROUTE 34 |
| Entity Address, Address Line Two | SUITE 303 |
| Entity Address, City or Town | FARMINGDALE |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07727 |
| City Area Code | 877 |
| Local Phone Number | 870.7005 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001571776 |
| Common Stock [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | CHMI |
| Security Exchange Name | NYSE |
| 8.20% Series A Cumulative Redeemable Preferred Stock, $0.01 par value [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 8.20% Series A Cumulative Redeemable Preferred Stock, $0.01 par value |
| Trading Symbol | CHMI-PRA |
| Security Exchange Name | NYSE |
| 8.250% Series B Fixed-to-Floating Rate Cumulative Redeemable [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | 8.250% Series B Fixed-to-Floating Rate Cumulative Redeemable |
| Trading Symbol | CHMI-PRB |
| Security Exchange Name | NYSE |
