Business Segments (Tables)

6 Months Ended

Jun. 30, 2014

Business Segments [Abstract]

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

		Three Months Ended				Six Months Ended
		June 30, 2014				June 30, 2014
		Net		Segment		Net		Segment
		Sales		Profit		Sales		Profit
Rail Products	$	107,484	$	6,836	$	180,980	$	12,152
Construction Products		41,810		3,371		69,193		4,587
Tubular Products		17,538		2,726		28,073		3,312
Total	$	166,832	$	12,933	$	278,246	$	20,051

		Three Months Ended				Six Months Ended
		June 30, 2013				June 30, 2013
		Net		Segment		Net		Segment
		Sales		Profit		Sales		Profit
Rail Products	$	90,892	$	5,835	$	172,291	$	12,036
Construction Products		43,697		2,056		80,508		2,518
Tubular Products		15,347		4,547		26,458		7,154
Total	$	149,936	$	12,438	$	279,257	$	21,708

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

		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
Income for reportable segments	$	12,933	$	12,438	$	20,051	$	21,708
Interest expense		(126)		(125)		(249)		(258)
Interest income		147		139		291		345
Other income		115		137		250		315
LIFO income (expense)		202		(14)		198		(254)
Equity in income of nonconsolidated investment		142		420		346		596
Corporate expense, cost of capital elimination, and other unallocated charges		(3,206)		(1,900)		(5,359)		(3,913)
Income from continuing operations before income taxes	$	10,207	$	11,095	$	15,528	$	18,539