Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2020

Marketable Securities [Abstract]

Unrealized Gain (Loss) on Investments

The table below summarizes the changes of our marketable securities portfolio for the years ended December 31, 2020 and 2019.

(Amounts in thousands)	Total
Balance as of December 31, 2018	$	152,198
Sale of marketable securities (primarily Lexington Realty Trust)	(168,314)
Transfer of PREIT investment balance(1)	54,962
Decrease in fair value of marketable securities	(5,533)
Balance as of December 31, 2019	33,313
Sale of marketable securities on January 23, 2020	(28,375)
Decrease in fair value of marketable securities	(4,938)
Balance as of December 31, 2020	$	—

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(1)In March 2019, we converted all of our 6,250,000 PREIT operating partnership units into common shares and began accounting for our investment as a marketable security. Prior to conversion, we accounted for our investment under the equity method.