Marketable Securities	9 Months Ended
	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable SecuritiesAs of September 30, 2020 and December 31, 2019, we owned 564,612 and 535,265 common shares, respectively, of The Macerich Company (“Macerich”) (NYSE: MAC). The increase in shares owned was due to a dividend received in stock from Macerich during the three months ended June 30, 2020. As of September 30, 2020 and December 31, 2019, the fair value of these shares was $3,834,000 and $14,409,000, respectively, based on Macerich’s closing share price of $6.79 per share and $26.92 per share, respectively. These shares are presented at fair value as “marketable securities” on our consolidated balance sheets and the gains and losses resulting from the mark-to-market of these securities are recognized in current period earnings.