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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders' Equity
Issuance of common stock (in shares)	1,551	3,791	7,034	5,518
Dividend reinvestments/stock purchases under the DRSPP	$ 116	$ 198	$ 467	$ 364