Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Manufacturing (including revenues from affiliates of $223 and $776 for the three and six months ended June 30, 2016, respectively, and $61,743 and $182,939 for the same periods in 2015)	$ 97,548	$ 144,481	$ 221,340	$ 366,292
Railcar leasing	33,209	28,216	65,977	52,801
Railcar services (including revenues from affiliates of $7,249 and $15,243 for the three and six months ended June 30, 2016, respectively, and $6,406 and $12,786 for the same periods in 2015)	19,727	19,301	39,347	36,681
Total revenues	150,484	191,998	326,664	455,774
Cost of revenues:
Manufacturing	(81,437)	(107,714)	(183,718)	(282,248)
Railcar leasing	(10,356)	(8,993)	(20,531)	(16,694)
Railcar services	(15,420)	(14,737)	(30,657)	(28,582)
Total cost of revenues	(107,213)	(131,444)	(234,906)	(327,524)
Gross profit	43,271	60,554	91,758	128,250
Selling, general and administrative	(7,297)	(5,315)	(15,254)	(12,996)
Net gains on disposition of leased railcars	0	25	167	25
Earnings from operations	35,974	55,264	76,671	115,279
Interest income (including income from related parties of $427 and $884 for the three and six months ended June 30, 2016, respectively, and $538 and $1,095 for the same periods in 2015)	453	550	931	1,113
Interest expense	(5,678)	(5,694)	(11,584)	(10,432)
Loss on debt extinguishment	0	0	0	(2,126)
Other Income	1	5	1	11
Earnings from joint ventures	1,458	2,141	2,944	3,938
Earnings before income taxes	32,208	52,266	68,963	107,783
Income tax expense	(12,312)	(19,297)	(26,275)	(39,838)
Net earnings	$ 19,896	$ 32,969	$ 42,688	$ 67,945
Net earnings per common share—basic and diluted (in dollars per share)	$ 1.02	$ 1.54	$ 2.18	$ 3.18
Weighted average common shares outstanding—basic and diluted (in shares)	19,511	21,352	19,588	21,352
Cash dividends declared per common share (in dollars per share)	$ 0.40	$ 0.40	$ 0.80	$ 0.80