Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
Dec. 31, 2016 |
|
| Significant Accounting Policies [Line Items] | |||||
| Lessor operating lease description | A lease arrangement is classified as an operating lease if none of the following criteria are met: (i) ownership transfers to the lessee prior to or shortly after the end of the lease term, (ii) lessee has a bargain purchase option during or at the end of the lease term, (iii) the lease term is greater than or equal to 75% of the underlying property’s estimated useful life, or (iv) the present value of the future minimum lease payments (excluding executory costs) is greater than or equal to 90% of the fair value of the leased property. If one or more of these criteria are met, and the minimum lease payments are determined to be reasonably predictable and collectible, the lease arrangement is generally accounted for as a direct financing lease. Consistent with ASC 840, Leases, if the fair value of the land component is 25% or more of the total fair value of the leased property, the land is considered separately from the building for purposes of applying the lease term and minimum lease payments criterion in (iii) and (iv) above | ||||
| Lease term as percentage of property's useful life | 75.00% | 75.00% | |||
| Present value of future minimum lease payments as percentage of fair value of leased property | 90.00% | 90.00% | |||
| Fair value of land component as percentage of leased property | 25.00% | 25.00% | |||
| Rents received in advance | $ 6,936 | $ 6,936 | $ 7,566 | ||
| Fair value of debt | 887,685 | 887,685 | 873,026 | ||
| Carrying amount of debt | 883,431 | 883,431 | $ 869,524 | ||
| Revenue from tax reimbursed from tenants | 544 | $ 457 | 1,179 | $ 828 | |
| ASU 2017-01 | |||||
| Significant Accounting Policies [Line Items] | |||||
| Acquisition costs capitalized | 4,150 | 4,150 | |||
| Tenants | |||||
| Significant Accounting Policies [Line Items] | |||||
| Direct payment for property taxes | 3,498 | 2,942 | 10,957 | 9,567 | |
| Property taxes expense | $ 560 | $ 372 | $ 1,199 | $ 724 | |
| Broadstone Net Lease, LLC | |||||
| Significant Accounting Policies [Line Items] | |||||
| Percentage of economic interests owned | 91.90% | 91.90% | 91.40% | ||
| Percentage of economic interests owned by non-controlling interests | 8.10% | 8.10% | 8.60% | ||