Investments in and Loans to Joint Ventures (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Ohio Castings [Member]
Financial position:
Current assets	$ 15,214	$ 13,479
Non-current assets	8,651	9,140
Total assets	23,865	22,619
Current liabilities	4,752	4,621
Members’ deficit	19,113	17,998
Total liabilities and members’ deficit	23,865	22,619
Axis [Member]
Financial position:
Current assets	8,124	7,144
Non-current assets	38,655	45,379
Total assets	46,779	52,523
Current liabilities	12,398	10,489
Non-current liabilities	57,253	64,253
Total liabilities	69,651	74,742
Members’ deficit	(22,872)	(22,219)
Total liabilities and members’ deficit	46,779	52,523
Amtek Railcar [Member]
Financial position:
Current assets		11,252
Non-current assets		51,524
Total assets		62,776
Current liabilities		7,452
Non-current liabilities		41,247
Total liabilities		48,699
Members’ deficit		14,077
Total liabilities and members’ deficit		$ 62,776