Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Manufacturing (including revenues from affiliates of $250,455, $103,679 and $1,230 in 2013, 2012 and 2011, respectively)	$ 646,100	$ 633,547	$ 453,092
Railcar leasing	31,871	13,444	1,075
Railcar services (including revenues from affiliates of $17,167, $21,442 and $24,730 in 2013, 2012 and 2011, respectively)	72,621	64,732	65,218
Total revenues	750,592	711,723	519,385
Cost of revenues:
Manufacturing	(503,178)	(506,083)	(410,308)
Railcar leasing	(13,394)	(5,906)	(682)
Railcar services	(55,408)	(51,383)	(50,599)
Total cost of revenues	(571,980)	(563,372)	(461,589)
Gross profit	178,612	148,351	57,796
Selling, general and administrative (including costs from related parties of $1,122, $586 and $582 in 2013, 2012 and 2011, respectively)	(27,705)	(26,931)	(25,047)
Earnings from operations	150,907	121,420	32,749
Interest income (including income from related parties of $2,678, $2,902 and $2,839 in 2013, 2012 and 2011, respectively)	2,716	3,003	3,654
Interest expense	(7,337)	(17,765)	(20,291)
Loss on debt extinguishment	(392)	(2,267)	0
Other income (loss) (including income from a related party of $19, $15 and $16 in 2013, 2012 and 2011, respectively)	2,037	1,905	(10)
Loss from joint ventures	(8,595)	(451)	(7,900)
Earnings before income taxes	139,336	105,845	8,202
Income tax expense	(52,440)	(42,022)	(3,866)
Net earnings	$ 86,896	$ 63,823	$ 4,336
Net earnings per common share—basic and diluted (in dollars per share)	$ 4.07	$ 2.99	$ 0.20
Weighted average common shares outstanding - basic and diluted (in shares)	21,352	21,352	21,352
Cash dividends declared per common share (in dollars per share)	$ 1	$ 0.25	$ 0