Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Schedule of Components of Property, Plant and Equipment

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

	December 31,
(in thousands)	2018		2017
Land	$	29,739	$	22,388
Land improvements and leasehold improvements	68,826		69,127
Buildings and storage facilities	284,998		284,820
Machinery and equipment	393,640		373,127
Construction in progress	102,394		7,502
	879,597		756,964
Less: accumulated depreciation	402,886		372,287
	$	476,711	$	384,677

Components of Railcar Assets Leased to Others

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

	December 31,
(in thousands)	2018		2017
Rail Group assets leased to others	$	640,349	$	531,391
Less: accumulated depreciation	118,564		107,948
	$	521,785	$	423,443