Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule Of Accounts Receivable, Net [Table Text Block]

		2015		2014
Trade	$	79,100	$	90,494
Allowance for doubtful accounts		(1,485)		(1,036)
		77,615		89,458
Other		872		720
	$	78,487	$	90,178

Operating Segments [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule Of Accounts Receivable, Net [Table Text Block]

		2015		2014
Rail Products and Services	$	43,155	$	45,931
Construction Products		20,489		33,760
Tubular and Energy Services		13,971		9,767
	$	77,615	$	89,458