Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2016

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, 2016		December 31, 2015		March 31, 2015
Land	$	30,138	$	29,928	$	23,380
Land improvements and leasehold improvements	77,531		77,191		73,651
Buildings and storage facilities	304,276		303,482		274,877
Machinery and equipment	377,879		375,028		340,109
Construction in progress	47,755		32,871		18,354
	837,579		818,500		730,371
Less: accumulated depreciation	374,918		363,240		332,137
	$	462,661	$	455,260	$	398,234

Components of railcar assets leased to others

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

(in thousands)	March 31, 2016		December 31, 2015		March 31, 2015
Rail Group assets leased to others	$	436,948	$	434,051	$	402,509
Less: accumulated depreciation	99,287		95,940		89,414
	$	337,661	$	338,111	$	313,095