Leases (Tables)

12 Months Ended

Dec. 31, 2016

Sale Leaseback Transaction [Line Items]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

	Capital		Operating
	Leases		Leases
Year Ended December 31,
2017	$	13,237	$	103,325
2018	12,442		64,520
2019	11,977		37,272
2020	11,007		27,722
2021	8,959		26,816
Thereafter	—		80,692
Total minimum lease payments	$	57,622	$	340,347
Less amount representing interest (2.00% – 7.36%)	8,225
Present value of minimum lease payments	49,397
Less amount due in one year	10,323
Total Long-Term Capital Lease Obligation	$	39,074

333131 Mining Machinery and Equipment Manufacturing [Member]

Sale Leaseback Transaction [Line Items]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

2017		2018		2019		2020		2021		Thereafter		Total
$	40,299	$	13,819	$	6,909	$	—	$	—	$	—	$	61,027

Discontinued Operations [Member]

Sale Leaseback Transaction [Line Items]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

2017		2018		2019		2020		2021		Thereafter		Total
$	4,496	$	2,992	$	1,701	$	627	$	—	$	—	$	9,816