Summary of Significant Accounting Policies - Summary of Reclassifications of Components of Revenue (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Revenues | |||||||||||
| Rental income from operating leases | $ 279,515 | ||||||||||
| Earned income from direct financing leases | 4,018 | ||||||||||
| Other income from real estate transactions | 668 | ||||||||||
| Total revenues | $ 84,931 | $ 76,401 | $ 69,053 | $ 68,430 | $ 63,094 | $ 61,764 | $ 57,032 | $ 55,589 | 298,815 | $ 237,479 | $ 181,563 |
| Total revenues | $ 84,931 | $ 76,401 | $ 69,053 | $ 68,430 | $ 63,094 | $ 61,764 | $ 57,032 | $ 55,589 | $ 298,815 | 237,479 | 181,563 |
| ASC 842 | As Originally Reported | |||||||||||
| Revenues | |||||||||||
| Rental income from operating leases | 222,208 | 170,493 | |||||||||
| Earned income from direct financing leases | 3,941 | 4,141 | |||||||||
| Operating expenses reimbursed from tenants | 11,221 | 6,721 | |||||||||
| Other income from real estate transactions | 109 | 208 | |||||||||
| Total revenues | 237,479 | 181,563 | |||||||||
| Total revenues | $ 237,479 | $ 181,563 | |||||||||