Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment (Tables) [Abstract]

Components of property, plant and equipment

	December 31,
(in thousands)	2011		2010
Land	$	17,655	$	15,424
Land improvements and leasehold improvements		47,958		45,080
Buildings and storage facilities		150,461		141,349
Machinery and equipment		191,833		181,650
Software		10,861		10,306
Construction in progress		13,006		2,572
		431,774		396,381
Less: accumulated depreciation and amortization		256,687		245,349
	$	175,087	$	151,032

Components of Railcar assets leased to others

	December 31,
(in thousands)	2011		2010
Railcar assets leased to others	$	272,883	$	234,667
Less: accumulated depreciation		75,746		66,184
	$	197,137	$	168,483