Business Description - Summary of Outstanding Equity and Economic Ownership Interest (Detail) - shares shares in Thousands |
Sep. 30, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Broadstone Net Lease, LLC | ||
| Business Description [Line Items] | ||
| Percent ownership of OP, Shares of Common Stock | 94.00% | 92.70% |
| Percent ownership of OP, OP Units | 6.00% | 7.30% |
| Percent ownership of OP, Total Diluted Shares | 100.00% | 100.00% |
| Ownership Interest | ||
| Business Description [Line Items] | ||
| Shares of Common Stock | 161,255 | 145,609 |
| OP Units | 10,370 | 11,399 |
| Total Diluted Shares | 171,625 | 157,008 |