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, 2016	[1]	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	[1]	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014	[3]
Earnings Per Share [Abstract]
Net income attributable to RDI common stockholders	$ 352		$ 3,855	$ 2,970	$ 2,226	$ 3,614		$ 381	$ 15,997	$ 3,118	$ 9,403	$ 23,110	[2]	$ 25,335	[2]
Weighted average shares of common stock – basic											23,320,048	23,293,696	[2]	23,431,855	[2]
Weighted average dilutive impact of stock-based awards											201,109	201,922		317,366
Weighted averageshares of common stock – diluted											23,521,157	23,495,618	[2]	23,749,221	[2]
Basic EPS attributable for RDI common stockholders	$ 0.01		$ 0.17	$ 0.13	$ 0.09	$ 0.14		$ 0.02	$ 0.69	$ 0.14	$ 0.40	$ 0.99	[2]	$ 1.08	[2]
Diluted EPS attributable to RDI common stockholders	$ 0.02		$ 0.16	$ 0.13	$ 0.09	$ 0.14		$ 0.02	$ 0.68	$ 0.14	$ 0.40	$ 0.98	[2]	$ 1.07	[2]
Awards excluded from diluted EPS											92,500			248,750

[1] Fourth Quarter Results included the impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).

[2] Certain 2015 and 2014 balances included the restatement impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).

[3] 2015 and 2014 balances included the restatement impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).