| Goodwill and Intangible Assets - Changes in Carrying Amount of Franchise Assets and Goodwill (Detail) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 
|---|---|
| Jun. 30, 2014 | |
| Indefinite-lived Intangible Assets [Line Items] | |
| Net Goodwill, Beginning balance | $ 476,315 | 
| Net Goodwill, Additions through current year acquisitions | 1,256 | 
| Net Goodwill, Prior year acquisition allocations | (3) | 
| Net Goodwill, Reclassifications to assets held for sale | (3,432) | 
| Net Goodwill, Reductions from dispositions | (4,187) | 
| Net Goodwill, Ending balance | 469,949 | 
| Franchise Assets [Member] | |
| Indefinite-lived Intangible Assets [Line Items] | |
| Franchise Assets, Beginning balance | 79,535 | 
| Franchise Assets, Additions through current year acquisitions | 0 | 
| Franchise Assets, Prior year acquisition allocations | 0 | 
| Franchise Assets, Reclassifications to assets held for sale | (4,600) | 
| Franchise Assets, Reductions from dispositions | (834) | 
| Franchise Assets, Ending balance | $ 74,101 | 
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- Definition Goodwill Reclassified To Assets Held For Sale No definition available. 
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- Definition Intangible Assets Reclassified To Assets Held For Sale No definition available. 
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, resulting from a business combination. No definition available. 
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- Details 
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of increase (decrease) of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit, from purchase accounting adjustments. No definition available. 
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- Definition Amount of write-off of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit associated with the sale of all or a portion of a reporting unit. No definition available. 
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