Leases (Tables)

12 Months Ended

Dec. 31, 2014

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,
2015	$	11,074	$	104,232
2016	9,761		94,421
2017	8,774		87,210
2018	8,269		60,705
2019	7,511		25,068
Thereafter	13,483		78,954
Total minimum lease payments	$	58,872	$	450,590
Less amount representing interest (1.50% – 7.36%)	11,452
Present value of minimum lease payments	47,420
Less amount due in one year	7,964
Total Long-Term Capital Lease Obligation	$	39,456

333131 Mining Machinery and Equipment Manufacturing [Member]

Sale Leaseback Transaction [Line Items]

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

2015		2016		2017		2018		2019		Thereafter		Total
$	26,685	$	26,685	$	26,685	$	26,685	$	13,343	$	—	$	120,083

Discontinued Operations [Member]

Sale Leaseback Transaction [Line Items]

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

2015		2016		2017		2018		2019		Thereafter		Total
$	8,561	$	7,637	$	4,496	$	2,992	$	1,701	$	627	$	26,014