Leases Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	$ 90,128	$ 83,064	$ 75,696
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Current	90,565
Operating Leases, Future Minimum Payments, Due in Two Years	85,225
Operating Leases, Future Minimum Payments, Due in Three Years	73,158
Operating Leases, Future Minimum Payments, Due in Four Years	66,536
Operating Leases, Future Minimum Payments, Due in Five Years	41,221
Operating Leases, Future Minimum Payments, Due Thereafter	81,321
Operating Leases, Future Minimum Payments Due	438,026
Discontinued Operations [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Current	8,561
Operating Leases, Future Minimum Payments, Due in Two Years	8,561
Operating Leases, Future Minimum Payments, Due in Three Years	7,637
Operating Leases, Future Minimum Payments, Due in Four Years	4,496
Operating Leases, Future Minimum Payments, Due in Five Years	2,992
Operating Leases, Future Minimum Payments, Due Thereafter	2,328
Operating Leases, Future Minimum Payments Due	34,575
333131 Mining Machinery and Equipment Manufacturing [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Current	33,084
Operating Leases, Future Minimum Payments, Due in Two Years	33,084
Operating Leases, Future Minimum Payments, Due in Three Years	33,084
Operating Leases, Future Minimum Payments, Due in Four Years	26,685
Operating Leases, Future Minimum Payments, Due in Five Years	26,685
Operating Leases, Future Minimum Payments, Due Thereafter	13,343
Operating Leases, Future Minimum Payments Due	$ 165,965