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Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Earnings Per Share [Abstract]        
Net income attributable to RDI common stockholders $ 1,297 $ 1,577 $ 9,405 $ 23,677
Weighted average number of common stock – basic 23,006,040 22,968,017 22,988,227 23,101,619
Weighted average dilutive impact of awards 191,884 244,615 196,794 244,615
Weighted average number of common stock – diluted 23,197,924 23,212,632 23,185,021 23,346,234
Basic EPS attributable to RDI common stockholders $ 0.06 $ 0.07 $ 0.41 $ 1.02
Diluted EPS attributable to RDI common stockholders $ 0.06 $ 0.07 $ 0.41 $ 1.01
Awards excluded from diluted EPS 276,681 149,841 126,840 149,841