Note 6 - Property, Plant and Equipment

12 Months Ended

Dec. 31, 2017

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

( 6 ) Property, Plant and Equipment

Property, plant and equipment consist of the following:

	December 31,
	2017			2016
Land	$	6,911		$	4,268
Buildings and improvements		129,065			131,794
Machinery and equipment		451,882			377,990
Furniture and fixtures		2,850			1,995
Construction in progress		34,400			24,102
Total		625,108			540,149
Accumulated depreciation		(370,809	)		(323,057	)
Net	$	254,299		$	217,092

Depreciation expense was

$29,970,

$23,654,

and

$21,196

for the years ended

December 31, 2017,

2016

and

2015,

respectively. Total capital expenditures in

2017

and

2016

were

$53,900

and

$51,604,

respectively.