Property,Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Land	$ 26,198	$ 21,325
Building and improvements	106,388	100,765
Machinery and equipment	200,805	174,230
Vehicles	39,468	33,499
Containers	132,094	114,705
Office equipment and furniture	56,515	48,136
Software	19,495	14,912
Construction in progress	30,925	18,645
Total property, plant & equipment	611,888	526,217
Less: accumulated depreciation	(276,018)	(232,305)
Property, plant and equipment, net	$ 335,870	$ 293,912	$ 267,971