Note 6 - Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Property, Plant and Equipment [Table Text Block]

	December 31,
	2016			2015
Land	$	4,268		$	4,122
Buildings and improvements		131,794			106,983
Machinery and equipment		377,990			358,540
Furniture and fixtures		1,995			1,734
Construction in progress		24,102			39,813
Total		540,149			511,192
Accumulated depreciation		(323,057	)		(324,705	)
Net	$	217,092		$	186,487