Recent Transactions (Impairments On Properties Held And Used) (Narrative) (Details) $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2015
USD ($)
property
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2016
USD ($)
|
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| Real Estate Properties [Line Items] | ||||||||||
| Mortgage loan | $ 726,611 | $ 726,611 | $ 888,585 | |||||||
| Impairments | 33,743 | [1] | $ 164,176 | [1] | 197,919 | $ 25,200 | ||||
| Investment in property | 3,343,236 | 3,343,236 | $ 3,472,794 | |||||||
| Mortgage loans, carrying amount | $ 59,700 | $ 59,700 | ||||||||
| Non-core Properties [Member] | ||||||||||
| Real Estate Properties [Line Items] | ||||||||||
| Number of impaired properties reduced to carrying value | property | 25 | |||||||||
| Estimated fair value | $ 438,600 | 438,600 | ||||||||
| Aggregate carrying value | $ 602,800 | $ 602,800 | ||||||||
| Number of impaired properties | property | 3 | |||||||||
| Impairments | $ 164,200 | |||||||||
| ||||||||||