Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Operations [Abstract]
Revenues	$ 598,518	$ 290,393	$ 677,449
Cost of sales	556,175	277,168	612,463
Gross profit	42,343	13,225	64,986
Selling, general and administrative expenses	35,317	27,464	32,736
Gain on sale of railcars available for lease	(1,403)	(604)	(989)
Gain on sale of assets held for sale	(1,078)	0	0
Restructuring and impairment charges	0	10,452	0
Operating income (loss)	9,507	(24,087)	33,239
Interest expense and deferred financing costs	(1,077)	(809)	(384)
Other income	42	64	11
Income (loss) before income taxes	8,472	(24,832)	32,866
Income tax provision (benefit)	2,568	(5,537)	13,771
Net income (loss)	$ 5,904	$ (19,295)	$ 19,095
Net income (loss) per common share - basic	$ 0.49	$ (1.61)	$ 1.60
Net income (loss) per common share - diluted	$ 0.49	$ (1.61)	$ 1.60
Weighted average common shares outstanding - basic	12,001,587	11,954,238	11,932,926
Weighted average common shares outstanding - diluted	12,103,520	11,954,238	11,969,367
Dividends declared per common share	$ 0.24	$ 0.24	$ 0.24