Interest and Other Investment Income (Loss), Net (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Net Investment Income [Line Items]
Increase (decrease) in fair value of marketable securities:	$ 461	$ (32,986)
Interest on cash and cash equivalents and restricted cash	2,067	3,557
Interest on loans receivable	1,606	743
Dividends on marketable securities	0	3,353
Other, net	911	949
Interest and other investment income, net	5,045	(24,384)
Lexington Realty Trust
Net Investment Income [Line Items]
Increase (decrease) in fair value of marketable securities:	16,068	(32,875)
PREIT
Net Investment Income [Line Items]
Increase (decrease) in fair value of marketable securities:	(15,649)	0
Other
Net Investment Income [Line Items]
Increase (decrease) in fair value of marketable securities:	$ 42	$ (111)

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.1)
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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