Real Estate Property Held For Sale	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Real Estate Property Held For Sale	Real Estate Property Held For SaleIn March 2021, the Company entered into a contract to sell Kendall Manor, a property located in Houston, TX, for $24,500,000 with a net book value of $16,800,000. The buyer's right to terminate the contract expired on March 17, 2021. At March 31, 2021, the Company reclassified the net book value of the property's land, building and building improvements as Property held-for-sale in the accompanying balance sheet. It is anticipated that the sale of this property will be completed in May 2021.