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Real Estate Investments Business Acquisitions (Details) shares in Thousands |  | 3 Months Ended
--- | --- | ---
Mar. 01, 2017 USD ($) property shares | Mar. 31, 2017 USD ($) a shares | Mar. 31, 2016 USD ($)
Business Acquisition [Line Items] |  |  |
Purchase Price |  | $ 9,500,000 | $ 35,294,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | 0 | $ 0
Equity One Inc. [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Number of real estate properties acquired | property | 121 |  |
Shares of common stock issued for merger (in shares) | shares | 65,495 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | $ 1,509,212,000 |  |
Intangible assets | $ 500,645,000 |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  | $ 34,936,000 |
Garden City [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Mar. 06, 2017 |
Property Name |  | The Field at Commonwealth |
City/State |  | Chantilly, VA |
Business Acquisition, Percentage of Voting Interests Acquired |  | 100.00% |
Purchase Price |  | $ 9,500,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | $ 0 |
The Market at Springwoods Village [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  |  | Mar. 04, 2016
Property Name |  |  | The Market at Springwoods Village (1)
City/State |  |  | Houston, TX
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 53.00%
Purchase Price |  |  | $ 17,994,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  | 0
Non-controlling interest recorded, fair value |  |  | $ 8,400,000
Pinecrest Place [Member] [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Land Subject to Ground Leases | a |  | 10.67 |
Date Purchased |  | Mar. 08, 2017 |
Property Name |  | Pinecrest Place (1) |
City/State |  | Miami, FL |
Business Acquisition, Percentage of Voting Interests Acquired |  | 100.00% |
Purchase Price |  | $ 0 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  | $ 0 |
Garden City [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  |  | Feb. 22, 2016
Property Name |  |  | Garden City Park
City/State |  |  | Garden City Park, NY
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 100.00%
Purchase Price |  |  | $ 17,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  | 0
Parent Company [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Conversion of Stock, Conversion Ratio |  | 0.45 |
Shares of common stock issued for merger (in shares) | shares |  | 65,500 |
Partially Owned Properties [Member] | Equity One Inc. [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Number of real estate properties acquired | property | 8 |  |
Off-Market Favorable Lease [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 0 | 10,171,000
Off-Market Favorable Lease [Member] | Garden City [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | 0 |
Off-Market Favorable Lease [Member] | The Market at Springwoods Village [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  |  | 0
Off-Market Favorable Lease [Member] | Pinecrest Place [Member] [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | 0 |
Off-Market Favorable Lease [Member] | Garden City [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  |  | 10,171,000
Off-Market Lease, Unfavorable [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | 0 | 2,940,000
Off-Market Lease, Unfavorable [Member] | Garden City [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | 0 |
Off-Market Lease, Unfavorable [Member] | The Market at Springwoods Village [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  |  | 0
Off-Market Lease, Unfavorable [Member] | Pinecrest Place [Member] [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 0 |
Off-Market Lease, Unfavorable [Member] | Garden City [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  |  | $ 2,940,000

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