Earnings Per Share (Computation Of Basic And Dilutes Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income attributable to RDI common stockholders	$ 19,032	$ 2,970	$ 22,063	$ 5,199
Weighted average shares of common stock – basic	23,148,995	23,334,892	23,168,703	23,334,892
Weighted average dilutive impact of awards	247,148	209,067	247,148	209,067
Weighted average shares of common stock – diluted	23,396,143	23,543,959	23,415,851	23,543,959
Basic EPS attributable for RDI common stockholders	$ 0.82	$ 0.13	$ 0.95	$ 0.22
Diluted EPS attributable to RDI common stockholders	$ 0.81	$ 0.13	$ 0.94	$ 0.22
Awards excluded from diluted EPS	149,841	265,327	149,841	265,327