Screenvision Exhibition, Inc. - Additional Information (Detail) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended		6 Months Ended
	Oct. 14, 2010	Sep. 30, 2011	Jan. 31, 2011	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Carrying value of ownership interest in SV Holdco				$ 6,040		$ 6,040		$ 5,079
Concessions and other				84,113	$ 67,871	157,091	$ 129,223
Accounts receivable				12,371		12,371		$ 18,635
Class C Membership Units [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of issued and outstanding membership units received	20.00%
Threshold amount applicable for future profits and appreciation in assets	$ 85,000			$ 88,000		$ 88,000
Maximum forfeiture limit						25.00%
Maximum bonus units to be received						33.00%
Screenvision Exhibition, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
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
Non-forfeitable ownership interest at estimated fair value	6,555
Non-forfeitable Class C and Class A membership units				15.00%		15.00%		15.00%
Recognized concessions and other revenue received	30,000
Aggregate amount deferred to be recognized as concessions and other revenue	$ 36,555
Concessions and other				$ 2,874	2,784	$ 5,401	5,563
Intercompany gain to Company				507	$ 491	953	$ 982
Accounts receivable				2,395		2,395		$ 2,383
SV Holdco, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Carrying value of ownership interest in SV Holdco				$ 4,939		$ 4,939		$ 4,195
SV Holdco, LLC [Member] | Member Units [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of Class C and Class A membership units held				20.00%		20.00%
Carrying value of ownership interest in SV Holdco				$ 4,939		$ 4,939
SV Holdco, LLC [Member] | Class A Membership Units [Member]
Schedule of Equity Method Investments [Line Items]
Voluntary capital contribution made to SV Holdco		$ 718
SV Holdco, LLC [Member] | Class A Membership Units [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of issued and outstanding membership units received		1.00%