Fair Value Measurements - Assets or Liabilities Measured at Fair Value on a Non-Recurring basis (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Long-lived assets held and used	$ 799,319
Goodwill	475,929
Franchise assets	77,100
Total Gain (loss) on long-lived assets held and used	(4,394)
Total Gain (loss) on franchise assets	(2,200)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Long-lived assets held and used	799,319
Goodwill	475,929
Franchise assets	$ 77,100