Fair Value Disclosures (Measurements) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2017 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Impairment of real estate assets |
$ 15,902
|
$ 5,686
|
|
| Terminal capitalization rates |
9.30%
|
|
|
| Discount rates |
10.40%
|
|
|
| Roundtree Place |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
$ 11,300
|
|
|
| Pensacola Square |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
8,800
|
|
|
| Southland Shopping Center, Middleburg Heights, OH |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
4,500
|
|
|
| Skyway Plaza |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
2,900
|
|
|
| The Manchester Collection |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
|
|
$ 46,900
|
| Fashion Square |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
|
|
2,400
|
| Crossroads Center |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
|
|
14,300
|
| The Plaza at Salmon Run |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
|
|
7,800
|
| Smith’s |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Real estate investment |
|
|
$ 1,900
|
| Minimum |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Terminal capitalization rates |
|
|
7.00%
|
| Discount rates |
|
|
7.90%
|
| Maximum |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Marketable securities, unrealized losses |
(300)
|
|
$ (200)
|
| Terminal capitalization rates |
|
|
8.50%
|
| Discount rates |
|
|
9.50%
|
| Fair Value, Measurements, Recurring | Marketable Securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
27,063
|
|
$ 28,006
|
| Fair Value, Measurements, Recurring | Interest Rate Derivatives |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
29,193
|
|
24,420
|
| Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable Securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
1,216
|
|
725
|
| Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest Rate Derivatives |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
0
|
|
0
|
| Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Marketable Securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
25,847
|
|
27,281
|
| Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest Rate Derivatives |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
29,193
|
|
24,420
|
| Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Marketable Securities |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
0
|
|
0
|
| Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Interest Rate Derivatives |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
0
|
|
0
|
| Fair Value, Measurements, Nonrecurring | Properties |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
27,477
|
|
73,303
|
| Impairment of real estate assets |
15,698
|
|
17,195
|
| Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Properties |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
0
|
|
0
|
| Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2) | Properties |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
0
|
|
0
|
| Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Properties |
|
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Derivative asset |
$ 27,477
|
|
$ 73,303
|