Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2012

Property, Plant and Equipment [Abstract]

Components of property, plant and equipment

The components of property, plant and equipment are as follows:

(in thousands)	June 30, 2012		December 31, 2011		June 30, 2011
Land	$	19,505	$	17,655	$	15,424
Land improvements and leasehold improvements	52,536		47,958		45,634
Buildings and storage facilities	172,354		150,461		142,864
Machinery and equipment	243,216		191,833		186,245
Software	11,204		10,861		10,603
Construction in progress	33,613		13,006		6,696
	532,428		431,774		407,466
Less accumulated depreciation and amortization	266,153		256,687		253,824
	$	266,275	$	175,087	$	153,642

Components of Railcar assets leased to others

The components of Railcar assets leased to others are as follows:

(in thousands)	June 30, 2012		December 31, 2011		June 30, 2011
Railcar assets leased to others	$	332,997	$	272,883	$	248,030
Less accumulated depreciation	80,032		75,746		69,889
	$	252,965	$	197,137	$	178,141