Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2015

Property, Plant and Equipment [Abstract]

Components of property, plant and equipment

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

(in thousands)	March 31, 2015		December 31, 2014		March 31, 2014
Land	$	23,380	$	23,380	$	21,906
Land improvements and leasehold improvements	73,651		71,817		67,876
Buildings and storage facilities	274,877		275,059		234,109
Machinery and equipment	340,109		333,559		309,283
Software	68,193		55,436		13,403
Construction in progress	18,354		29,620		52,200
	798,564		788,871		698,777
Less: accumulated depreciation and amortization	346,926		335,264		312,645
	$	451,638	$	453,607	$	386,132

Components of railcar assets leased to others

The components of Rail Group assets leased to others are as follows:

(in thousands)	March 31, 2015		December 31, 2014		March 31, 2014
Rail Group assets leased to others	$	402,509	$	384,958	$	316,520
Less: accumulated depreciation	89,414		87,211		78,986
	$	313,095	$	297,747	$	237,534