Property, Plant and Equipment and Railcars on Leases, net (Tables)

6 Months Ended

Jun. 30, 2018

Components of property, plant and equipment

The following table summarizes the components of property, plant, equipment and railcars on leases, net:

	June 30, 2018			December 31, 2017
	(in thousands)
Operations / Corporate:
Buildings	$	186,394		$	186,664
Machinery and equipment	233,906			233,025
Land	5,357			5,285
Construction in process	4,570			1,818
	430,227			426,792
Less accumulated depreciation	(274,740		)	(264,257		)
Property, plant and equipment, net	$	155,487		$	162,535
Railcar Leasing:
Railcars on lease	$	1,174,851		$	1,159,868
Less accumulated depreciation	(140,520		)	(123,454		)
Railcars on lease, net	$	1,034,331		$	1,036,414

Summary of future contractual minimum rental revenues required under non-cancellable operating leases for railcars

As of June 30, 2018, future contractual minimum rental revenues required under non-cancellable operating leases for railcars with terms longer than one year are as follows (in thousands):

Remaining 6 months of 2018	$	65,698
2019	113,777
2020	76,330
2021	57,805
2022	38,206
2023 and thereafter	82,150
Total	433,966

Property, Plant and Equipment, Other Types [Member]

Components of property, plant and equipment

The following table summarizes depreciation expense:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(in thousands)
Total depreciation expense	$	15,642	$	14,301	$	30,573	$	28,174
Depreciation expense on leased railcars	$	10,194	$	8,658	$	19,589	$	16,894