Issuances of Common Stock - Dividend Reinvestment and Stock Purchase Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Dividend Reinvestment and Stock Purchase Plan
Gross proceeds			$ 5,731	$ 5,322
DRSPP
Dividend Reinvestment and Stock Purchase Plan
Dividend Reinvestment and Stock Purchase Plan, authorized shares (in shares)	26,000,000		26,000,000
Shares remaining for future issuance (in shares)	11,250,748		11,250,748
Common stock | DRSPP
Dividend Reinvestment and Stock Purchase Plan
Shares of common stock issued (in shares)	43,260	39,423	84,631	82,817
Gross proceeds	$ 2,900	$ 2,700	$ 5,700	$ 5,300
Common stock | DRSPP waiver approval process
Dividend Reinvestment and Stock Purchase Plan
Shares of common stock issued (in shares)			0	0