Business Segments And Geographic Area Information (Results Of Operations For Each Of Our Principal Business Segments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 254,748	$ 258,221	$ 254,430
Operating expense	198,205	204,036	201,674
Depreciation and amortization	15,108	14,764	15,595
General and administrative expense	4,617	3,917	3,316
Impairment expense			1,463
Segment operating income	36,818rdi_SegmentOperatingIncome	35,504rdi_SegmentOperatingIncome	32,382rdi_SegmentOperatingIncome
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(7,461)	(7,653)	(7,529)
Operating expense	(7,461)	(7,653)	(7,529)
Cinema Exhibition [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	237,861	239,418	234,703
Operating expense	195,896	200,859	198,040
Depreciation and amortization	11,047	10,741	11,154
General and administrative expense	3,575	3,273	2,598
Segment operating income	27,343	24,545	22,911
Real Estate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	24,348	26,456	27,256
Operating expense	9,770	10,830	11,163
Depreciation and amortization	4,061	4,023	4,441
General and administrative expense	1,042	644	718
Impairment expense			1,463
Segment operating income	$ 9,475	$ 10,959	$ 9,471