Real Estate - Schedule of Property Dispositions (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposition of properties	$ 0	$ 28,815
Disposed of by sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale Price			$ 222,153
Gain on disposition of properties			$ 57,161
Core Portfolio | Disposed of by sale | 60 Orange St - Bloomfield, NJ.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Dec. 13, 2022
Sale Price			$ 26,400
Gain on disposition of properties			$ 7,439
Core Portfolio | Disposed of by sale | Henderson Avenue (Parcel) - Dallas, TX
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Oct. 07, 2022
Sale Price			$ 3,050
Gain on disposition of properties			$ (194)
Fund IV | Disposed of by sale | NE Grocer Portfolio (Selected Assets) - Pennsylvania
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Jan. 26, 2022
Sale Price			$ 45,350
Gain on disposition of properties			$ 13,784
Fund IV | Disposed of by sale | Lincoln Place Fairview Heights, IL
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			May 25, 2022
Sale Price			$ 40,670
Gain on disposition of properties			$ 12,216
Fund IV | Disposed of by sale | Wake Forest Crossing - Wake Forest, NC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Aug. 24, 2022
Sale Price			$ 38,919
Gain on disposition of properties			$ 8,885
Fund III | Disposed of by sale | Cortlandt Crossing - Westchester County, New York
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Feb. 09, 2022
Sale Price			$ 65,533
Gain on disposition of properties			$ 13,255
Fund V | Disposed of by sale | New Towne (Parcel) - Canton, MI
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Feb. 01, 2022
Sale Price			$ 2,231
Gain on disposition of properties			$ 1,776