Business Segments (Tables)

6 Months Ended

Jun. 30, 2015

Business Segments [Abstract]

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

		Three Months Ended				Six Months Ended
		June 30, 2015				June 30, 2015
		Net		Segment		Net		Segment
		Sales		Profit		Sales		Profit
Rail Products and Services	$	86,882	$	6,413	$	164,558	$	12,485
Construction Products		49,516		5,158		83,806		6,386
Tubular and Energy Services		35,021		358		60,962		2,316
Total	$	171,419	$	11,929	$	309,326	$	21,187

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

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

		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2015		2014		2015		2014
Income for reportable segments	$	11,929	$	12,933	$	21,187	$	20,051
Interest expense		(1,288)		(126)		(1,901)		(249)
Interest income		37		147		94		291
Other income		(95)		138		708		273
LIFO income		406		202		400		198
Equity in (loss) income of nonconsolidated investments		(186)		142		(13)		346
Corporate expense, cost of capital elimination, and other unallocated charges		(2,980)		(3,206)		(5,985)		(5,359)
Income before income taxes	$	7,823	$	10,230	$	14,490	$	15,551

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

		June 30,		December 31,
		2015		2014
Rail Products and Services	$	257,856	$	239,951
Construction Products		97,300		102,978
Tubular and Energy Services		318,521		130,289
Unallocated corporate assets		36,039		30,192
LIFO		(7,889)		(8,289)
Total	$	701,827	$	495,121