Earnings Per Share (Computation Of Basic And Dilutes Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Earnings Per Share [Abstract]
Net income attributable to RDI common stockholders	$ 3,277	$ 381	$ 15,997	$ 3,118	$ 17,220	$ 3,939	$ 4,757	$ (215)	$ 22,773	$ 25,701	[1]	$ 9,041	[1]
Weighted average shares of common stock – basic									23,293,696	23,431,855	[1]	23,348,003	[1]
Weighted average dilutive impact of stock-based awards									201,922	317,366		172,268
Weighted average shares of common stock – diluted									23,495,618	23,749,221	[1]	23,520,271	[1]
Basic EPS attributable for RDI common stockholders	$ 0.14	$ 0.02	$ 0.69	$ 0.13	$ 0.74	$ 0.17	$ 0.20	$ (0.01)	$ 0.98	$ 1.10	[1]	$ 0.39	[1]
Diluted EPS attributable to RDI common stockholders	$ 0.14	$ 0.02	$ 0.68	$ 0.13	$ 0.72	$ 0.17	$ 0.20	$ (0.01)	$ 0.97	$ 1.08	[1]	$ 0.38	[1]
Awards excluded from diluted EPS										248,750		528,850

[1] Certain prior period amounts have been reclassified to conform to the current period presentation (see Note 2 - Significant Accounting Policies - Reclassifications).