XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.25.3

Real Estate Investments - Schedule of Properties Acquired (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024
Business Acquisition [Line Items] |  |  |
Purchase Price | $ 29,400 | $ 597,760 | $ 118,054
Debt Assumed, Net of Discounts (Premium) | 207,331 | 207,331 | 0
Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Purchase Price |  | 571,510 | 71,404
Debt Assumed, Net of Discounts (Premium) | 195,447 | 195,447 | 0
Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Purchase Price |  | 26,250 | 46,650
Debt Assumed, Net of Discounts (Premium) | 11,884 | 11,884 | 0
Off-Market Favorable Lease [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 67,842 | 67,842 | 10,487
Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 65,437 | 65,437 | 5,360
Off-Market Favorable Lease [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 2,405 | 2,405 | 5,127
Off-Market Lease, Unfavorable [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 28,225 | 28,225 | 4,052
Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 22,727 | 22,727 | 2,175
Off-Market Lease, Unfavorable [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 5,498 | $ 5,498 | $ 1,877
Putnam Plaza [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Jan. 01, 2025 |
Property Name |  | Putnam Plaza |
City/State |  | Carmel Hamlet, NY |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 31,000 |
Debt Assumed, Net of Discounts (Premium) | $ 16,749 | 16,749 |
Putnam Plaza [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 4,308 | 4,308 |
Putnam Plaza [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 460 | $ 460 |
Orange Meadows [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Jan. 10, 2025 |
Property Name |  | Orange Meadows |
City/State |  | Orange, CT |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 4,200 |
Debt Assumed, Net of Discounts (Premium) | $ 0 | 0 |
Orange Meadows [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 354 | 354 |
Orange Meadows [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 299 | $ 299 |
Brentwood Place [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Mar. 14, 2025 |
Property Name |  | Brentwood Place |
City/State |  | Nashville, TN |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 118,500 |
Debt Assumed, Net of Discounts (Premium) | $ 40,060 | 40,060 |
Brentwood Place [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 9,371 | 9,371 |
Brentwood Place [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 18,295 | $ 18,295 |
Rancho Mission Viejo Portfolio [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Jul. 23, 2025 |
Property Name |  | Rancho Mission Viejo |
City/State |  | Various, CA |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 357,000 |
Debt Assumed, Net of Discounts (Premium) | $ 126,860 | 126,860 |
Rancho Mission Viejo Portfolio [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 45,356 | 45,356 |
Rancho Mission Viejo Portfolio [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 2,224 | $ 2,224 |
Chestnut Ridge Shopping Center [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Aug. 01, 2025 |
Property Name |  | Chestnut Ridge Shopping Center |
City/State |  | Montvale, NJ |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 18,300 |
Debt Assumed, Net of Discounts (Premium) | $ 0 | 0 |
Chestnut Ridge Shopping Center [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 3,070 | 3,070 |
Chestnut Ridge Shopping Center [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 458 | $ 458 |
Baybrook East [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Aug. 01, 2025 |
Property Name |  | Baybrook East |
City/State |  | Webster, TX |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 29,097 |
Debt Assumed, Net of Discounts (Premium) | $ 11,778 | 11,778 |
Baybrook East [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 2,978 | 2,978 |
Baybrook East [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 991 | $ 991 |
Baybrook East Phase II [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Aug. 01, 2025 |
Property Name |  | Baybrook East Phase II |
City/State |  | Webster, TX |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 3,597 |
Debt Assumed, Net of Discounts (Premium) | $ 0 | 0 |
Baybrook East Phase II [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 0 | 0 |
Baybrook East Phase II [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 0 | $ 0 |
The Villages at Seven Pines [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Sep. 15, 2025 |
Property Name |  | The Villages at Seven Pines |
City/State |  | Jacksonville, FL |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 8,466 |
Debt Assumed, Net of Discounts (Premium) | $ 0 | 0 |
The Villages at Seven Pines [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 0 | 0 |
The Villages at Seven Pines [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 0 | $ 0 |
Ellis Village Center [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | Sep. 19, 2025 |
Property Name |  | Ellis Village Center |
City/State |  | Tracy, CA |
Ownership | 100.00% | 100.00% |
Purchase Price |  | $ 1,350 |
Debt Assumed, Net of Discounts (Premium) | $ 0 | 0 |
Ellis Village Center [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 0 | 0 |
Ellis Village Center [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 0 | $ 0 |
Armonk Square [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  | May 12, 2025 |
Property Name |  | Armonk Square |
City/State |  | Armonk, NY |
Ownership | 20.00% | 20.00% |
Purchase Price |  | $ 26,250 |
Debt Assumed, Net of Discounts (Premium) | $ 11,884 | 11,884 |
Armonk Square [Member] | Off-Market Favorable Lease [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | 2,405 | 2,405 |
Armonk Square [Member] | Off-Market Lease, Unfavorable [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities | $ 5,498 | $ 5,498 |
The Shops at Stone Bridge [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  |  | Feb. 23, 2024
Property Name |  |  | The Shops at Stone Bridge
City/State |  |  | Cheshire, CT
Ownership |  |  | 100.00%
Purchase Price |  |  | $ 8,000
Debt Assumed, Net of Discounts (Premium) |  |  | 0
The Shops at Stone Bridge [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | 0
The Shops at Stone Bridge [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | $ 0
Compo Acres North Shopping Center [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  |  | May 03, 2024
Property Name |  |  | Compo Acres North shopping center
City/State |  |  | Westport, CT
Ownership |  |  | 100.00%
Purchase Price |  |  | $ 45,500
Debt Assumed, Net of Discounts (Premium) |  |  | 0
Compo Acres North Shopping Center [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | 5,360
Compo Acres North Shopping Center [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | $ 2,175
Jordan Ranch Market [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  |  | Jul. 16, 2024
Property Name |  |  | Jordan Ranch Market
City/State |  |  | Houston, TX
Ownership |  |  | 50.00%
Purchase Price |  |  | $ 15,784
Debt Assumed, Net of Discounts (Premium) |  |  | 0
Jordan Ranch Market [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | 0
Jordan Ranch Market [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | $ 0
Oakley Shops at Laurel Fields [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  |  | Aug. 21, 2024
Property Name |  |  | Oakley Shops at Laurel Fields
City/State |  |  | Oakley, CA
Ownership |  |  | 100.00%
Purchase Price |  |  | $ 2,120
Debt Assumed, Net of Discounts (Premium) |  |  | 0
Oakley Shops at Laurel Fields [Member] | Off-Market Favorable Lease [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | 0
Oakley Shops at Laurel Fields [Member] | Off-Market Lease, Unfavorable [Member] | Consolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | $ 0
East Greenwich Square [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Date Purchased |  |  | Aug. 30, 2024
Property Name |  |  | East Greenwich Square
City/State |  |  | East Greenwich, RI
Ownership |  |  | 70.00%
Purchase Price |  |  | $ 46,650
Debt Assumed, Net of Discounts (Premium) |  |  | 0
East Greenwich Square [Member] | Off-Market Favorable Lease [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | 5,127
East Greenwich Square [Member] | Off-Market Lease, Unfavorable [Member] | Unconsolidated Properties [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Intangible Assets/Liabilities |  |  | $ 1,877

X
- Definition Business Acquisition Location, City and State + References No definition available. + Details
Name: | reg_BusinessAcquisitionLocationCityAndState
Namespace Prefix: | reg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when acquirer obtains control of acquiree in business combination, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-38 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 25 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-7 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 25 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-6 + Details
Name: | us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-4 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 47 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-47 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (f)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-2 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-2 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (f)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-3 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-4A Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-4 Reference 22: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-4A Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-4A Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-4 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 36: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 Reference 37: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 38: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 39: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 40: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 41: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 42: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Name of acquiree in business combination. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-38 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 + Details
Name: | us-gaap_BusinessAcquisitionNameOfAcquiredEntity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interest acquired in business combination. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 38 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-38 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of identifiable finite-lived intangible asset acquired in business combination and recognized at acquisition date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of liability assumed in business combination and recognized at acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-41 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-13 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=us-gaap_ConsolidatedPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=us-gaap_UnconsolidatedPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OffMarketFavorableLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | reg_FiniteLivedIntangibleLiabilitiesAxis=reg_OffMarketLeaseUnfavorableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_PutnamPlazaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_OrangeMeadowsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_BrentwoodPlaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_RanchoMissionViejoPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_ChestnutRidgeShoppingCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_BaybrookEastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_BaybrookEastPhaseIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_TheVillagesAtSevenPinesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_EllisVillageCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_ArmonkSquareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_TheShopsAtStoneBridgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_CompoAcresNorthShoppingCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_JordanRanchMarketMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_OakleyShopsAtLaurelFieldsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=reg_EastGreenwichSquareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |