| Document And Entity Information | Aug. 03, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 3, 2021 |
| Entity Registrant Name | BROADSTONE NET LEASE, INC. |
| Entity Central Index Key | 0001424182 |
| Entity Emerging Growth Company | true |
| Entity File Number | 001-39529 |
| Entity Incorporation, State or Country Code | MD |
| Entity Tax Identification Number | 26-1516177 |
| Entity Address, Address Line One | 800 Clinton Square |
| Entity Address, City or Town | Rochester |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 14604 |
| City Area Code | 585 |
| Local Phone Number | 287-6500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Ex Transition Period | true |
| Title of 12(b) Security | Common Stock, $0.00025 par value |
| Trading Symbol | BNL |
| Security Exchange Name | NYSE |
