Debt - Revolving Credit Facilities - Narrative (Details) - USD ($)
|
6 Months Ended |
|
|
Jun. 30, 2018 |
Dec. 31, 2017 |
Aug. 18, 2016 |
| Unsecured Debt |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Line of credit facility, accordion feature, increase limit |
$ 1,000,000,000
|
|
|
| Commitment fee |
0.25%
|
|
|
| Origination costs |
$ 4,800,000
|
|
$ 3,400,000
|
| Line of credit facility, remaining borrowing capacity |
$ 453,500,000
|
|
|
| Unsecured Debt | Minimum |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Commitment fee |
0.125%
|
|
|
| Unsecured Debt | Maximum |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Commitment fee |
0.30%
|
|
|
| Unsecured Debt | LIBOR |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Basis spread on variable rate |
1.25%
|
|
|
| Unsecured Debt | LIBOR | Minimum |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Basis spread on variable rate |
0.875%
|
|
|
| Unsecured Debt | LIBOR | Maximum |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Basis spread on variable rate |
1.55%
|
|
|
| Revolving Credit Facility |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Total debt, gross |
$ 346,500,000
|
|
|
| Revolving Credit Facility | Deferred Costs And Other Assets |
|
|
|
| Line of Credit Facility [Line Items] |
|
|
|
| Unamortized deferred financing costs |
$ 1,000,000
|
$ 1,600,000
|
|