Property, Plant and Equipment

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

PROPERTY, PLANT AND EQUIPMENT

December 31,	2016			2015
(Dollars in thousands)
Land and buildings	$	67,915		$	73,803
Machinery and equipment	485,185			486,612
Leasehold improvements and others	4,868			4,204
Construction in progress	26,301			20,455
	584,269			585,074
Accumulated depreciation	(356,866		)	(350,428		)
Property, plant and equipment, net	$	227,403		$	234,646

Depreciation expense was $34.3 million, $34.5 million and $35.6 million for the years ended December 31, 2016, 2015 and 2014, respectively.  In 2014, depreciation expense includes $6.5 million of accelerated depreciation charges as a result of shortened estimated useful lives due to restructuring activities described in Note 2, "Restructuring".