Segment Reporting - Revenues and Income from Operations for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues
Total revenues	$ 180,696	$ 154,779
Segment (loss) income from operations
Total (loss) income from operations	(2,950)	7,597
United States, Excluding All Points [Member]
Revenues
Total revenues	144,121	118,108
Segment (loss) income from operations
Total (loss) income from operations	(2,723)	6,637
All Points [Member]
Revenues
Total revenues	5,113	4,564
Segment (loss) income from operations
Total (loss) income from operations	334	298
Canada [Member]
Revenues
Total revenues	29,416	30,021
Segment (loss) income from operations
Total (loss) income from operations	(271)	454
Mexico [Member]
Revenues
Total revenues	1,711	1,734
Segment (loss) income from operations
Total (loss) income from operations	136	246
Australia [Member]
Revenues
Total revenues	335	352
Segment (loss) income from operations
Total (loss) income from operations	$ (426)	$ (38)