XML 46 R50.htm IDEA: XBRL DOCUMENT

Property, Plant and Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]
Depreciation expense on property, plant and equipment	$ 37.5	$ 27.4	$ 20.4
Asset impairment charges	4.4
Depreciation expense on railcar assets leased to others	$ 14.7	$ 15.9	$ 13.8

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives.