Earnings Per Share (Computation Of Basic And Dilutes Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to RDI common stockholders	$ 2,226	$ 3,118
Weighted average shares of common stock – basic	23,334,892	23,242,467
Weighted average dilutive impact of awards	197,966	281,188
Weighted average shares of common stock – diluted	23,532,858	23,523,655
Basic EPS attributable for RDI common stockholders	$ 0.10	$ 0.13
Diluted EPS attributable to RDI common stockholders	$ 0.09	$ 0.13
Awards excluded from diluted EPS	238,370