Unaudited Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2020	[1]	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	[1]	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 15,021		$ 10,191	$ 3,422	$ 49,228	$ 68,880		$ 70,386	$ 76,009	$ 61,493	$ 77,862	$ 276,768	$ 308,931
Net income (loss)	(17,663)		(19,352)	(22,887)	(5,955)	(27,458)		801	2,294	(2,140)	(65,857)	(26,503)	14,166
Net income (loss) attributable to RDI common stockholders	$ (17,395)		$ (19,228)	$ (22,702)	$ (5,875)	$ (27,487)		$ 851	$ 2,331	$ (2,124)	$ (65,200)	$ (26,429)	$ 14,034
Basic earnings (loss) per share	$ (0.80)		$ (0.88)	$ (1.04)	$ (0.27)	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)	$ (3.00)	$ (1.17)	$ 0.61
Diluted earnings (loss) per share	$ (0.80)		$ (0.88)	$ (1.04)	$ (0.27)	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)	$ (3.00)	$ (1.17)	$ 0.60
As Reported [Member]
Revenue	$ 15,021		$ 10,191	$ 3,422	$ 49,228	$ 68,880		$ 70,456	$ 76,096	$ 61,551
Net income (loss)	(17,663)		(19,352)	(22,887)	(5,955)	(27,458)		852	2,357	(2,097)
Net income (loss) attributable to RDI common stockholders	$ (17,395)		$ (19,228)	$ (22,702)	$ (5,875)	$ (27,487)		$ 902	$ 2,394	$ (2,081)
Basic earnings (loss) per share	$ (0.80)		$ (0.88)	$ (1.04)	$ (0.27)	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)
Diluted earnings (loss) per share	$ (0.80)		$ (0.88)	$ (1.04)	$ (0.27)	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)
Adjustments [Member]
Revenue								$ (70)	$ (87)	$ (58)
Net income (loss)								(51)	(63)	(43)
Net income (loss) attributable to RDI common stockholders								$ (51)	$ (63)	$ (43)

[1] Since previously published financial statements have been corrected, there is no impact on the fourth quarter results for 2019 or for the full year of 2020 and so no data is displayed here.