Carrying Amounts and Fair Values of Certain Assets (Detail) - USD ($) $ in Thousands	Jun. 17, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, carrying amount	$ 137,794	$ 7,933
Restricted cash equivalents, carrying amount	90,837	96,375
Investments in marketable securities, carrying amount	8,866	8,119
Advertising fund cash equivalents, restricted, carrying amount	27,283	19,945
Advertising fund investments, restricted, carrying amount	80,152	74,007
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents, fair value	137,794	7,933
Restricted cash equivalents, fair value	90,837	96,375
Investments in marketable securities, carrying amount	8,866	8,119
Advertising fund cash equivalents, restricted, fair value	27,283	19,945
Advertising fund investments, restricted, fair value	$ 80,152	$ 74,007

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Advertising fund cash equivalents restricted fair value disclosure.

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Advertising fund investments restricted.

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Advertising fund investments restricted fair value disclosure.

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Amount of restricted short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of investment in marketable security, classified as noncurrent.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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