Unaudited Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2019	[1]	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	[1]	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue	$ 68,880		$ 70,386	$ 76,009	$ 61,493	$ 74,877		$ 74,150	$ 84,125	$ 75,779	$ 276,768	$ 308,931	$ 279,556
Net income (loss)	(27,458)		801	2,294	(2,140)	4,926		1,177	5,028	3,035	(26,503)	14,166	30,876
Net income (loss) attributable to RDI common shareholders	$ (27,487)		$ 851	$ 2,331	$ (2,124)	$ 4,880		$ 1,215	$ 4,926	$ 3,013	$ (26,429)	$ 14,034	$ 30,865
Basic earnings (loss) per share	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)	$ 0.21		$ 0.06	$ 0.22	$ 0.13	$ (1.17)	$ 0.61	$ 1.34
Diluted earnings (loss) per share	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)	$ 0.21		$ 0.06	$ 0.22	$ 0.13	$ (1.17)	$ 0.60	$ 1.33
As Reported [Member]
Revenue	$ 68,880		$ 70,456	$ 76,096	$ 61,551	$ 74,990		$ 74,261	$ 84,262	$ 75,872
Net income (loss)	(27,458)		852	2,357	(2,097)	5,006		1,259	5,129	3,104
Net income (loss) attributable to RDI common shareholders	$ (27,487)		$ 902	$ 2,394	$ (2,081)	$ 4,960		$ 1,297	$ 5,027	$ 3,082
Basic earnings (loss) per share	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)	$ 0.21		$ 0.06	$ 0.22	$ 0.13
Diluted earnings (loss) per share	$ (0.99)		$ 0.04	$ 0.10	$ (0.09)	$ 0.21		$ 0.06	$ 0.22	$ 0.13
Adjustments [Member]
Revenue			$ (70)	$ (87)	$ (58)	$ (113)		$ (111)	$ (137)	$ (93)
Net income (loss)			(51)	(63)	(43)	(80)		(82)	(101)	(69)
Net income (loss) attributable to RDI common shareholders			$ (51)	$ (63)	$ (43)	$ (80)		$ (82)	$ (101)	$ (69)

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