Stockholders' Equity of the Company - Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments (Details) - Dividend Reinvestment and Stock Purchase Plan (DRIP) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stockholders' Equity
Issuance of common stock (in shares)	2,004	4,086	9,038	9,604
Dividend reinvestments/stock purchases under the DRSPP	$ 146	$ 202	$ 613	$ 566