Summary of Significant Accounting Policies (Details) (USD $)	1 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Minimum	Dec. 31, 2013 Maximum	Dec. 31, 2013 Buildings and improvements Minimum	Dec. 31, 2013 Buildings and improvements Maximum	Dec. 31, 2013 Leasehold improvements Maximum	Dec. 31, 2013 Machinery and equipment Minimum	Dec. 31, 2013 Machinery and equipment Maximum	Dec. 31, 2013 Information systems hardware and software Minimum	Dec. 31, 2013 Information systems hardware and software Maximum	Dec. 31, 2013 Railcars in lease fleet	Dec. 31, 2013 Customer receivables concentration Energy Equipment Group customer	Dec. 31, 2011 Capital in excess of par value
Summary of Significant Accounting Policies (Textual) [Abstract]
Authorized amount from Board of Directors for share repurchase		$ 200,000,000
Share repurchase program effective date		Oct. 01, 2012
Share repurchase program expiry date		Dec. 31, 2014
Number of shares repurchased (in shares)			2,473,189	1,834,221
Cost of shares repurchased			108,200,000	45,200,000
Cost of shares repurchased settled in subsequent month	5,000,000
Reclassification of purchase of additional interest in TRIP Holdings																15,500,000
Likelihood threshold for recognition of uncertain tax positions			50.00%
Number of customers for net receivables concentration															1
Net receivables percentage															16.00%
Estimated useful life							3 years	30 years	7 years	2 years	10 years	2 years	5 years	35 years
Goodwill impairment charges			0	0
Net book value of intangible assets	$ 19,500,000		$ 19,500,000
Product warranty period against materials and manufacturing defects					1 year	5 years