Investments (Tables)

12 Months Ended

Dec. 31, 2016

Investments [Abstract]

Schedule Of Carrying Amount And Maximum Loss Exposure Of Equity Investments [Table Text Block]

		2016		2015
LB Pipe JV equity method investment	$	3,902	$	5,246
Revolving line of credit		1,235		-
Net investment in direct financing lease		871		995
	$	6,008	$	6,241

Schedule of Direct Financing Future Minimum Lease Payments for Capital Leases [Table Text Block]

		Minimum Lease Payments
2017	$	140
2018		150
2019		581
	$	871