Summary of Significant Accounting Policies - Summary of Debt Issuance Costs on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Unsecured Revolving Credit Facility | ||
| Debt Issuance Costs Net Alternative [Line Items] | ||
| Debt issuance costs | $ 4,692 | $ 3,431 |
| Less accumulated amortization | (2,312) | (1,170) |
| Debt issuance costs, net | 2,380 | 2,261 |
| Mortgage And Notes Payable | ||
| Debt Issuance Costs Net Alternative [Line Items] | ||
| Debt issuance costs | 667 | 834 |
| Less accumulated amortization | (309) | (335) |
| Debt issuance costs, net | 358 | 499 |
| Unsecured Term Notes | ||
| Debt Issuance Costs Net Alternative [Line Items] | ||
| Debt issuance costs | 9,898 | 6,997 |
| Less accumulated amortization | (1,979) | (2,770) |
| Debt issuance costs, net | $ 7,919 | $ 4,227 |