Segment Reporting - Revenues and Income from Operations for Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Sales Information [Line Items]
Goodwill	$ 616,578		$ 616,578		$ 615,515
Revenues
Total revenues	211,528	$ 209,933	628,032	$ 607,447
Segment income (loss) from operations
Total income from operations	15,770	10,433	38,746	24,699
United States excluding All Points Segment [Member]
Sales Information [Line Items]
Goodwill	580,420		580,420		580,420
Revenues
Total revenues	171,266	167,260	506,491	479,202
Segment income (loss) from operations
Total income from operations	15,270	12,672	35,705	25,628
All Points Segment [Member]
Sales Information [Line Items]
Goodwill	3,360		3,360		3,360
Revenues
Total revenues	4,945	5,116	14,395	15,857
Segment income (loss) from operations
Total income from operations	265	465	1,189	1,280
Canada [Member]
Sales Information [Line Items]
Goodwill	29,048		29,048		27,530
Revenues
Total revenues	33,313	35,645	101,612	106,194
Segment income (loss) from operations
Total income from operations	1,035	(2,191)	2,798	(1,400)
Mexico [Member]
Sales Information [Line Items]
Goodwill	3,750		3,750		4,205
Revenues
Total revenues	1,810	1,646	5,035	5,201
Segment income (loss) from operations
Total income from operations	17	(38)	(170)	225
Australia [Member]
Sales Information [Line Items]
Goodwill	0		0		$ 0
Revenues
Total revenues	194	266	499	993
Segment income (loss) from operations
Total income from operations	$ (817)	$ (475)	$ (776)	$ (1,034)