v2.4.0.6
Segment Reporting and Geographic Information - Assets by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Assets:    
Assets $ 1,175,793 $ 1,127,851
Cash & cash equivalents    
Cash & cash equivalents 65,548 12,027
United States [Member]
   
Cash & cash equivalents    
Cash & cash equivalents 63,347 9,400
Canada [Member]
   
Assets:    
Assets 15,477 13,269
Cash & cash equivalents    
Cash & cash equivalents 1,084 968
Mexico [Member]
   
Assets:    
Assets 17,816 17,097
Cash & cash equivalents    
Cash & cash equivalents 1,066 1,560
Australia [Member]
   
Assets:    
Assets 1,378 1,187
Cash & cash equivalents    
Cash & cash equivalents 51 99
United States, excluding All Points [Member]
   
Assets:    
Assets 1,133,824 1,088,246
All Points [Member]
   
Assets:    
Assets $ 7,298 $ 8,052