Quarterly Results of Operations - Schedule of Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 19,218	$ 11,937	$ 14,741	$ 13,130	$ 14,957	$ 13,231	$ 15,204	$ 15,596	$ 59,026	$ 58,988	$ 149,949
Total profit from segments	3,938	(2,303)	1,491	(3,238)	(731)	(578)	(1,013)	1,932	(112)	(390)	42,878
Net income (loss) attributable to the Company	$ 403	$ 7,987	$ (2,306)	$ 2,946	$ 538	$ (7,571)	$ (2,778)	$ (6,147)	$ 9,030	$ (15,958)	$ 173,699
Net income (loss) attributable to the Company per share - basic and diluted (in dollars per share)	$ 0.02	$ 0.50	$ (0.14)	$ 0.18	$ 0.03	$ (0.47)	$ (0.17)	$ (0.38)