Commitments and Contingencies - Additional Information (Detail) $ in Thousands |
6 Months Ended |
|---|---|
|
Jun. 30, 2020
USD ($)
| |
| Loss Contingencies [Line Items] | |
| Potential liability due to taxable sales of applicable properties | $ 22,300 |
| Minimum | Office Lease | |
| Loss Contingencies [Line Items] | |
| Non-cancellable operating leases, expiration year | 2020 |
| Minimum | Ground Lease | |
| Loss Contingencies [Line Items] | |
| Non-cancellable operating leases term | 2034 |
| Maximum | Office Lease | |
| Loss Contingencies [Line Items] | |
| Non-cancellable operating leases, expiration year | 2023 |
| Maximum | Ground Lease | |
| Loss Contingencies [Line Items] | |
| Non-cancellable operating leases term | 2066 |