Organization and Business - Schedule of Issuance and Sale of Common Stock (Details) - ATM Program - Private Placement - Operating Partnership - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Common shares sold (in shares)	7,236,439	0	4,532,343	2,887,296	1,306,531	78,194	5,543,066	12,352,700	14,656,078	19,280,491
Weighted average price (in dollars per share)	$ 18.54	$ 0	$ 18.39	$ 18.32	$ 18.44	$ 18.52	$ 18.07	$ 19.57	$ 18.45	$ 19.06
Net proceeds	$ 132,824	$ 0	$ 82,519	$ 52,358	$ 23,848	$ 1,433	$ 99,138	$ 239,337	$ 267,701	$ 363,756