Screenvision Exhibition, Inc. (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			1 Months Ended	0 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2011 Class A membership units [Member]	Oct. 14, 2010 Class C membership units [Member]	Sep. 30, 2012 Class C membership units [Member]	Jan. 31, 2011 Screenvision [Member]	Sep. 30, 2012 Screenvision [Member]	Sep. 30, 2011 Screenvision [Member]	Sep. 30, 2012 Screenvision [Member]	Sep. 30, 2011 Screenvision [Member]	Dec. 31, 2011 Screenvision [Member]
Screenvision Exhibition, Inc. (Textual) [Abstract]
Exhibition agreement, expiration date												Jul. 01, 2012
Modified Exhibition Agreement, additional term												30 years
Modified Exhibition Agreement, expiration date												Jul. 01, 2042
Cash received on Modified Exhibition Agreement									$ 30,000
Percentage of Class C and Class A membership units held										19.00%		19.00%
Percentage of issued and outstanding membership units received						1.00%	20.00%
Carrying value of ownership interest in SV Holdco	7,960		7,960		8,498					7,000		7,000
Threshold amount applicable for future profits and appreciation in assets							85,000	88,000
Maximum forfeiture limit								25.00%
Maximum bonus units to be received								33.00%
Concessions and other	47,067	47,253	143,888	128,665						2,700	2,800	7,600	7,100
Total intercompany gain	(1,950)	(1,291)	(958)	(987)						400	400	1,200	1,300
Amounts due included in accounts receivable related to Screenvision	4,706		4,706		4,985					1,336		1,336		1,860
Non-forfeitable ownership interest at estimated fair value										6,555		6,555
Non-forfeitable Class C and Class A membership units										15.00%		15.00%
Aggregate amount deferred to be recognized as concessions and other revenue												36,555
Voluntary capital contribution made to SV Holdco						$ 718