| Cover Cover | Feb. 17, 2022 | Feb. 01, 2022 |
| Document Information [Line Items] | ||
| Document Type | 8-K | |
| Document Period End Date | Feb. 17, 2022 | |
| Entity Registrant Name | NEW YORK MORTGAGE TRUST, INC. | |
| Entity Incorporation, State or Country Code | MD | |
| Entity File Number | 001-32216 | |
| Entity Tax Identification Number | 47-0934168 | |
| Entity Address, Address Line One | 90 Park Avenue | |
| Entity Address, City or Town | New York | |
| Entity Address, State or Province | NY | |
| Entity Address, Postal Zip Code | 10016 | |
| City Area Code | 212 | |
| Local Phone Number | 792-0107 | |
| 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 | 0001273685 | |
| Amendment Flag | false | |
| Common Stock, par value $0.01 per share | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Common Stock, par value $0.01 per share | |
| Trading Symbol | NYMT | |
| Security Exchange Name | NASDAQ | |
| 8.000% Series D Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 8.000% Series D Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | |
| Trading Symbol | NYMTN | |
| Security Exchange Name | NASDAQ | |
| 7.875% Series E Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 7.875% Series E Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | |
| Trading Symbol | NYMTM | |
| Security Exchange Name | NASDAQ | |
| 6.875% Series F Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 6.875% Series F Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | |
| Trading Symbol | NYMTL | |
| Security Exchange Name | NASDAQ | |
| 7.000% Series G Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 7.000% Series G Cumulative Redeemable Preferred Stock, par value $0.01 per share, $25.00 Liquidation Preference | |
| Trading Symbol | NYMTZ | |
| Security Exchange Name | NASDAQ |
