Business Segments (Tables)

9 Months Ended

Sep. 30, 2013

Business Segments [Abstract]

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30, 2013				September 30, 2013
		Net		Segment		Net		Segment
		Sales		Profit		Sales		Profit
Rail products	$	105,552	$	9,713	$	277,843	$	21,749
Construction products		49,320		2,855		129,828		5,373
Tubular products		7,376		985		33,834		8,139
Total	$	162,248	$	13,553	$	441,505	$	35,261

		Three Months Ended				Nine Months Ended
		September 30, 2012				September 30, 2012
		Net		Segment		Net		Segment
		Sales		Profit		Sales		Profit
Rail products	$	110,993	$	7,904	$	278,993	$	1,743
Construction products		45,948		3,083		132,173		6,062
Tubular products		13,405		3,783		36,651		9,501
Total	$	170,346	$	14,770	$	447,817	$	17,306

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
Income for reportable segments	$	13,553	$	14,770	$	35,261	$	17,306
Interest expense		(118)		(141)		(376)		(405)
Interest income		149		126		494		319
Other income (expense)		638		(612)		953		(4)
LIFO income		553		432		299		333
Equity in income of nonconsolidated investment		296		310		892		643
Corporate expense, cost of capital elimination
and other unallocated charges		(1,049)		(1,774)		(4,962)		(5,178)
Income from continuing operations before income taxes	$	14,022	$	13,111	$	32,561	$	13,014