Goodwill and Other Intangible Assets - Summary of Goodwill Amounts by Reporting Unit (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 615,515
Acquisitions	0
Dispositions	0
Other	1,535
Goodwill, Ending balance	617,050
United States Excluding All Points [Member]
Goodwill [Roll Forward]
Goodwill, Beginning balance	580,420
Acquisitions	0
Dispositions	0
Other	0
Goodwill, Ending balance	580,420
All Points [Member]
Goodwill [Roll Forward]
Goodwill, Beginning balance	3,360
Acquisitions	0
Dispositions	0
Other	0
Goodwill, Ending balance	3,360
Canada [Member]
Goodwill [Roll Forward]
Goodwill, Beginning balance	27,530
Acquisitions	0
Dispositions	0
Other	1,759
Goodwill, Ending balance	29,289
Mexico [Member]
Goodwill [Roll Forward]
Goodwill, Beginning balance	4,205
Acquisitions	0
Dispositions	0
Other	(224)
Goodwill, Ending balance	3,981
Australia [Member]
Goodwill [Roll Forward]
Goodwill, Beginning balance	0
Acquisitions	0
Dispositions	0
Other	0
Goodwill, Ending balance	$ 0