Segment Reporting - Assets by Segment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Total Assets	$ 1,262,044	$ 1,175,793
United States, excluding All Points [Member]
Assets
Total Assets	920,456	1,133,824
All Points [Member]
Assets
Total Assets	8,260	7,298
Canada [Member]
Assets
Total Assets	312,116	15,477
Mexico [Member]
Assets
Total Assets	19,569	17,816
Australia [Member]
Assets
Total Assets	$ 1,643	$ 1,378