| Cover Cover | Nov. 02, 2022 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 02, 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 |
