Commitments And Contingencies (Other) (Narrative) (Details) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2018
USD ($)
property
|
Mar. 31, 2017
USD ($)
|
Aug. 11, 2017
USD ($)
|
|
| Commitments And Contingencies [Line Items] | |||
| Purchase price of property | $ 55,935 | $ 22,471 | |
| Notes Receivable 5.85 Interest Rate [Member] | |||
| Commitments And Contingencies [Line Items] | |||
| Notes receivable | $ 43,400 | $ 44,700 | |
| Mortgage loan, maturity date | Jul. 01, 2019 | ||
| Interest rate | 5.85% | ||
| Purchase price of property | $ 73,000 | ||
| Prepayment of note receivable | $ 3,000 | ||
| Property Lock-Ups Expired [Member] | |||
| Commitments And Contingencies [Line Items] | |||
| Number of properties | property | 77 | ||
| Properties aggregate net book value | $ 940,000 | ||