The Company and Basis of Presentation (Details)	3 Months Ended
Mar. 28, 2013 theatre state screen	Mar. 29, 2012 screen theatre state
The Company and Basis of Presentation
Number of screens	485	516
Number of theatres	54	58
Number of states in which the entity operates	17	17
Number of weeks in each fiscal quarter for a 52-week fiscal year	91 days
Minimum
The Company and Basis of Presentation
Number of weeks in a fiscal year	364 days
Maximum
The Company and Basis of Presentation
Number of weeks in a fiscal year	371 days

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Data Type:	xbrli:stringItemType
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Disclosure of the number of weeks included in the financial results of each fiscal year.

No definition available.

Number of screens in operation by the entity as of the balance sheet date.

No definition available.

Name:	uatc_NumberOfScreensInOperation
Namespace Prefix:	uatc_
Data Type:	xbrli:integerItemType
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Period Type:	instant

Number of theatres in operation by the entity as of the balance sheet date.

No definition available.

Name:	uatc_NumberOfTheatresInOperation
Namespace Prefix:	uatc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Disclosure of the number of weeks in each fiscal quarter for a 52-week fiscal year.

No definition available.

Name:	uatc_NumberOfWeeksInFiscalQuarter52WeekYear
Namespace Prefix:	uatc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of states the entity operates in as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant