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

6 Months Ended

Jun. 30, 2016

Property, Plant and Equipment [Abstract]

Components of property, plant and equipment

The following table summarizes depreciation expense:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
	(in thousands)
Total depreciation expense	$	12,961	$	10,910	$	25,616	$	20,971
Depreciation expense on leased railcars	$	7,504	$	6,353	$	14,879	$	11,844

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

	June 30, 2016			December 31, 2015
	(in thousands)
Operations / Corporate:
Buildings	$	178,622		$	167,537
Machinery and equipment	225,931			219,488
Land	3,809			3,687
Construction in process	6,393			16,784
	414,755			407,496
Less accumulated depreciation	(238,106		)	(231,185		)
Property, plant and equipment, net	$	176,649		$	176,311
Railcar Leasing:
Railcars on leases	$	939,732		$	906,786
Less accumulated depreciation	(72,924		)	(58,069		)
Railcars on leases, net	$	866,808		$	848,717

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

As of June 30, 2016, 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 2016	$	64,605
2017	115,566
2018	102,210
2019	83,772
2020	48,846
2021 and thereafter	66,514
Total	$	481,513