Real Estate Investments (Details) $ / shares in Units, shares in Thousands		3 Months Ended	12 Months Ended
	Mar. 01, 2017 USD ($) property $ / shares shares	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 191,384,000	$ 387,528,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		$ 27,000,000	$ 27,000,000	$ 0
Equity One Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ 1,382,858,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 458,554,000
Stock Issued During Period, Shares, Acquisitions | shares	65,379
Business Acquisition, Share Price | $ / shares	$ 68.40
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 4,471,808,000
Business Combination, Consideration Transferred, Other Cash Payments	721,297,000
Business Combination, Consideration Transferred	$ 5,193,105,000
Number of real estate properties acquired | property	121
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land	$ 2,865,053,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings	2,619,553,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Properties in Development	68,744,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Properties Held-for-sale	19,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investments in Unconsolidated Properties	99,666,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Real Estate Assets	5,672,616,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	112,909,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	331,884,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	6,575,963,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	757,399,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	121,798,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Liabilities	503,661,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 5,193,105,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period		(601)
The Field at Commonwealth [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Mar. 06, 2017
Business Acquisition, Name of Acquired Entity			The Field at Commonwealth
Business Acquisition Location, City and State			Chantilly, VA
Business Acquisition, Property type			Development
Payments to Acquire Businesses, Gross			$ 9,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0	$ 0
Pinecrest Place [Member] [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Mar. 08, 2017
Business Acquisition, Name of Acquired Entity			Pinecrest Place (1)
Business Acquisition Location, City and State			Miami, FL
Business Acquisition, Property type			Development
Payments to Acquire Businesses, Gross			$ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0	$ 0
Mellody Farm [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Apr. 13, 2017
Business Acquisition, Name of Acquired Entity			Mellody Farm (2)
Business Acquisition Location, City and State			Chicago, IL
Business Acquisition, Property type			Development
Payments to Acquire Businesses, Gross			$ 26,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0	$ 0
Concord Outparcel [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Jun. 28, 2017
Business Acquisition, Name of Acquired Entity			Concord outparcel (3)
Business Acquisition Location, City and State			Miami, FL
Business Acquisition, Property type			Operating
Payments to Acquire Businesses, Gross			$ 350,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0	$ 0
Aventura Square Outparcel [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Jul. 20, 2017
Business Acquisition, Name of Acquired Entity			Aventura Square outparcel (4)
Business Acquisition Location, City and State			Miami, FL
Business Acquisition, Property type			Operating
Payments to Acquire Businesses, Gross			$ 1,750,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0	$ 0
Indigo Square [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Nov. 15, 2017
Business Acquisition, Name of Acquired Entity			Indigo Square
Business Acquisition Location, City and State			Mount Pleasant, SC
Business Acquisition, Property type			Development
Payments to Acquire Businesses, Gross			$ 3,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0	$ 0
Scripps Ranch Marketplace [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Dec. 21, 2017
Business Acquisition, Name of Acquired Entity			Scripps Ranch Marketplace
Business Acquisition Location, City and State			San Diego, CA
Business Acquisition, Property type			Operating
Payments to Acquire Businesses, Gross			$ 81,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		27,000,000	$ 27,000,000
Roosevelt Square [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Dec. 28, 2017
Business Acquisition, Name of Acquired Entity			Roosevelt Square
Business Acquisition Location, City and State			Seattle, WA
Business Acquisition, Property type			Operating
Payments to Acquire Businesses, Gross			$ 68,084,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		0	0
Garden City [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Feb. 22, 2016
Business Acquisition, Name of Acquired Entity				Garden City Park
Business Acquisition Location, City and State				Garden City Park, NY
Business Acquisition, Property type				Operating
Payments to Acquire Businesses, Gross				$ 17,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 0
The Market at Springwoods Village [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Mar. 04, 2016
Business Acquisition, Name of Acquired Entity				The Market at Springwoods Village (1)
Business Acquisition Location, City and State				Houston, TX
Business Acquisition, Property type				Development
Payments to Acquire Businesses, Gross				$ 17,994,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 0
Market Common Clarendon [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				May 16, 2016
Business Acquisition, Name of Acquired Entity				Market Common Clarendon
Business Acquisition Location, City and State				Arlington, VA
Business Acquisition, Property type				Operating
Payments to Acquire Businesses, Gross				$ 280,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 0
Klahanie Shopping Center [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Jul. 15, 2016
Business Acquisition, Name of Acquired Entity				Klahanie Shopping Center
Business Acquisition Location, City and State				Sammamish, WA
Business Acquisition, Property type				Operating
Payments to Acquire Businesses, Gross				$ 35,988,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 0
The Village at Tustin Legacy [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Aug. 04, 2016
Business Acquisition, Name of Acquired Entity				The Village at Tustin Legacy
Business Acquisition Location, City and State				Tustin, CA
Business Acquisition, Property type				Development
Payments to Acquire Businesses, Gross				$ 18,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 0
Nocatee Phase III [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Oct. 26, 2016
Business Acquisition, Name of Acquired Entity				Nocatee Phase III
Business Acquisition Location, City and State				Jacksonville, FL
Business Acquisition, Property type				Development
Payments to Acquire Businesses, Gross				$ 240,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 0
Brooklyn Station Phase II [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Oct. 30, 2016
Business Acquisition, Name of Acquired Entity				Brooklyn Station Phase II
Business Acquisition Location, City and State				Jacksonville, FL
Business Acquisition, Property type				Development
Payments to Acquire Businesses, Gross				$ 50,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				$ 0
The Village at Riverstone [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Dec. 06, 2016
Business Acquisition, Name of Acquired Entity				The Village at Riverstone
Business Acquisition Location, City and State				Houston, TX
Business Acquisition, Property type				Development
Payments to Acquire Businesses, Gross				$ 16,656,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				0
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]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		8,929,000	8,929,000	27,863,000
Off-Market Favorable Lease [Member] | The Field at Commonwealth [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Favorable Lease [Member] | Pinecrest Place [Member] [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Favorable Lease [Member] | Mellody Farm [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Favorable Lease [Member] | Concord Outparcel [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Favorable Lease [Member] | Aventura Square Outparcel [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		90,000	90,000
Off-Market Favorable Lease [Member] | Indigo Square [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Favorable Lease [Member] | Scripps Ranch Marketplace [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		4,997,000	4,997,000
Off-Market Favorable Lease [Member] | Roosevelt Square [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		3,842,000	$ 3,842,000
Off-Market Favorable Lease [Member] | Garden City [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				10,171,000
Off-Market Favorable Lease [Member] | The Market at Springwoods Village [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Favorable Lease [Member] | Market Common Clarendon [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				15,428,000
Off-Market Favorable Lease [Member] | Klahanie Shopping Center [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				2,264,000
Off-Market Favorable Lease [Member] | The Village at Tustin Legacy [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Favorable Lease [Member] | Nocatee Phase III [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Favorable Lease [Member] | Brooklyn Station Phase II [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Favorable Lease [Member] | The Village at Riverstone [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Parent Company [Member]
Business Acquisition [Line Items]
Conversion of Stock, Conversion Ratio			0.45
Stock Issued During Period, Shares, Acquisitions | shares			65,500
Off-Market Lease, Unfavorable [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		17,562,000	$ 17,562,000	19,141,000
Off-Market Lease, Unfavorable [Member] | The Field at Commonwealth [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Lease, Unfavorable [Member] | Pinecrest Place [Member] [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Lease, Unfavorable [Member] | Mellody Farm [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Lease, Unfavorable [Member] | Concord Outparcel [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Lease, Unfavorable [Member] | Aventura Square Outparcel [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		9,000	9,000
Off-Market Lease, Unfavorable [Member] | Indigo Square [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0	0
Off-Market Lease, Unfavorable [Member] | Scripps Ranch Marketplace [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		9,551,000	9,551,000
Off-Market Lease, Unfavorable [Member] | Roosevelt Square [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		8,002,000	$ 8,002,000
Off-Market Lease, Unfavorable [Member] | Garden City [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				2,940,000
Off-Market Lease, Unfavorable [Member] | The Market at Springwoods Village [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Lease, Unfavorable [Member] | Market Common Clarendon [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				15,662,000
Off-Market Lease, Unfavorable [Member] | Klahanie Shopping Center [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				539,000
Off-Market Lease, Unfavorable [Member] | The Village at Tustin Legacy [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Lease, Unfavorable [Member] | Nocatee Phase III [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Lease, Unfavorable [Member] | Brooklyn Station Phase II [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				0
Off-Market Lease, Unfavorable [Member] | The Village at Riverstone [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 0
Minimum rent [Member] | Equity One Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period		(2,386)
Depreciation and Amortization [Member] | Equity One Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period		1,435
Operating Expense [Member] | Equity One Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period		$ 350