Interest and Other Investment Income (Loss), Net (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Investment Income [Line Items]
Decrease (increase) in fair value of marketable securities	$ 0	$ (4,868)	$ (4,938)	$ (3,095)
Interest on loans receivable	574	1,604	2,810	4,845
Interest on cash and cash equivalents and restricted cash	253	4,060	5,717	8,753
Dividends on marketable securities	0	1,312	0	2,625
Credit losses on loans receivable	0	0	(13,369)	0
Other, net	902	937	2,712	2,802
Interest and other investment income, net	1,729	3,045	(7,068)	15,930
PREIT
Net Investment Income [Line Items]
Decrease (increase) in fair value of marketable securities	0	(4,875)	(4,938)	(19,211)
Lexington Realty Trust
Net Investment Income [Line Items]
Decrease (increase) in fair value of marketable securities	0	0	0	16,068
Other
Net Investment Income [Line Items]
Decrease (increase) in fair value of marketable securities	$ 0	$ 7	$ 0	$ 48

The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

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