Fair Value Measurements - Fair Value Inputs of Long-Lived Assets Held and Used (Details)
|
9 Months Ended |
12 Months Ended |
|
Sep. 30, 2017
ft²
$ / ft²
|
Dec. 31, 2016
ft²
$ / ft²
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Retail |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Property square footage (per sqft) | ft² |
355,428
|
290,770
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Retail | Minimum |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Sales price (in USD per sqft) |
13.66
|
17.17
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Retail | Maximum |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Sales price (in USD per sqft) |
285.98
|
502.23
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Retail | Weighted Average |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Sales price (in USD per sqft) |
53.99
|
58.78
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Industrial |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Property square footage (per sqft) | ft² |
0
|
104,864
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Industrial | Weighted Average |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Sales price (in USD per sqft) |
0.00
|
26.43
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Office |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Property square footage (per sqft) | ft² |
161,346
|
135,675
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Office | Minimum |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Sales price (in USD per sqft) |
24.82
|
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Office | Maximum |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Sales price (in USD per sqft) |
244.86
|
|
| Weighted Average Sale Price Per Square Foot of Comparable Properties [Member] | Office | Weighted Average |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Sales price (in USD per sqft) |
40.14
|
35.00
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Retail |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Property square footage (per sqft) | ft² |
0
|
516,916
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Retail | Minimum |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Listing price and broker opinion (in USD per sqft) |
|
15.40
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Retail | Maximum |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Listing price and broker opinion (in USD per sqft) |
|
170.02
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Retail | Weighted Average |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Listing price and broker opinion (in USD per sqft) |
0.00
|
40.80
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Industrial |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Property square footage (per sqft) | ft² |
370,824
|
149,627
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Industrial | Weighted Average |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Listing price and broker opinion (in USD per sqft) |
5.73
|
9.09
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Office |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Property square footage (per sqft) | ft² |
0
|
34,992
|
| Weighted Average Listing Price or Broker Opinion of Value Per Square Foot | Office | Weighted Average |
|
|
| Impaired Long-Lived Assets Held and Used [Line Items] |
|
|
| Listing price and broker opinion (in USD per sqft) |
0.00
|
56.81
|