Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 27, 2016

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property, Plant and Equipment

(Dollars in thousands)
	March 27, 2016			December 27, 2015
Land and buildings	$	73,011		$	73,803
Machinery and equipment	492,277			486,612
Leasehold improvements and others	4,464			4,204
Construction in progress	18,735			20,455
	588,487			585,074
Accumulated depreciation	(358,081		)	(350,428		)
Property, plant and equipment, net	$	230,406		$	234,646