v3.19.3.a.u2
Business Description - Summary of Economic Ownership Interest (Detail) - Broadstone Net Lease, LLC
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Description [Line Items]      
Percentage of shares owned by, Corporation 93.70% 92.70% 92.40%
Percentage of shares owned by, non-controlling interest 6.30% 7.30% 7.60%
Equity Method Investment, Ownership Percentage 100.00% 100.00% 100.00%