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

3 Months Ended

Mar. 31, 2016

Property, Plant and Equipment [Abstract]

Components of property, plant and equipment

The following table summarizes depreciation expense:

	Three Months Ended
	March 31,
	2016		2015
	(in thousands)
Total depreciation expense	$	12,655	$	10,061
Depreciation expense on leased railcars	$	7,375	$	5,491

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

	March 31, 2016			December 31, 2015
	(in thousands)
Operations / Corporate:
Buildings	$	177,736		$	167,537
Machinery and equipment	221,571			219,488
Land	3,687			3,687
Construction in process	6,624			16,784
	409,618			407,496
Less accumulated depreciation	(233,834		)	(231,185		)
Property, plant and equipment, net	$	175,784		$	176,311
Railcar Leasing:
Railcars on leases	$	926,909		$	906,786
Less accumulated depreciation	(65,421		)	(58,069		)
Railcars on leases, net	$	861,488		$	848,717

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

As of March 31, 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 9 months of 2016	$	96,568
2017	114,799
2018	101,443
2019	83,094
2020	48,256
2021 and thereafter	64,485
Total	$	508,645