Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt [Abstract]

Schedule of Debt [Table Text Block]

		2018		2017
Credit facilities	$	24,034	$	48,514
Industrial development bonds		10,000		15,000
Municipality-related loans		2,549		3,290
Other debt obligations (including capital leases)		21		—
Total debt		36,604		66,804
Current portion of long-term debt		(670)		(5,736)
Long-term debt	$	35,934	$	61,068

Schedule of Maturities of Long-term Debt [Table Text Block]

2019	$	670
2020		24,730
2021		398
2022		270
2023		240