Goodwill and Other Intangible Assets - Summary of Goodwill Amounts by Reporting Unit (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Goodwill [Line Items]
Goodwill, Beginning balance	$ 466,227
Acquisitions
Dispositions
Other	(486)
Goodwill, Ending balance	465,741
United States, Excluding All Points [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	446,382
Acquisitions
Dispositions
Other
Goodwill, Ending balance	446,382
All Points [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	58
Acquisitions
Dispositions
Other
Goodwill, Ending balance	58
Canada [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	12,785
Acquisitions
Dispositions
Other	(494)
Goodwill, Ending balance	12,291
Mexico [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	7,002
Acquisitions
Dispositions
Other	8
Goodwill, Ending balance	7,010
Australia [Member]
Goodwill [Line Items]
Goodwill, Beginning balance
Acquisitions
Dispositions
Other
Goodwill, Ending balance