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, 2017	Sep. 30, 2016		Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income attributable to RDI common stockholders	$ 1,556	$ 3,855	[1]	$ 23,619	$ 9,054	[1]
Weighted average number of common stock – basic	22,968,017	23,334,892	[1]	23,101,619	23,334,892	[1]
Weighted average dilutive impact of awards	244,615	197,904		244,615	197,904
Weighted average number of common stock – diluted	23,212,632	23,532,796	[1]	23,346,234	23,532,796	[1]
Basic EPS attributable for RDI common stockholders	$ 0.07	$ 0.17	[1]	$ 1.02	$ 0.39	[1]
Diluted EPS attributable to RDI common stockholders	$ 0.07	$ 0.16	[1]	$ 1.01	$ 0.38	[1]
Awards excluded from diluted EPS	149,841	108,000		149,841	108,000

[1] Certain 2016 balances have been reclassified to conform to the 2017 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).