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Investments in Unconsolidated Joint Ventures - Balance Sheet footnotes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments in unconsolidated joint ventures:
Total assets	$ 9,184,005	$ 8,853,571
Liabilities	6,738,745	6,022,601
Joint venture
Investments in unconsolidated joint ventures:
Amortization of difference between cost of investments and book value of underlying equity	13,168	18,834	$ 12,793
Joint venture | Pacific Premier Retail LLC—Various Properties | PPR Portfolio
Investments in unconsolidated joint ventures:
Total assets	2,857,757	2,932,401
Liabilities	$ 1,687,042	$ 1,732,976

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