Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property, plant and equipment

(In thousands)	2016			2015
Land	$	11,505		$	11,613
Buildings and improvements	121,967			122,514
Machinery and equipment	248,229			224,974
Computer hardware and software	30,544			29,688
Furniture and fixtures	5,829			5,788
Construction in progress	19,417			20,950
	437,491			415,527
Less accumulated depreciation	(186,700		)	(164,818		)
	250,791			250,709
Composite mats (rental fleet)	100,543			100,341
Less accumulated depreciation - composite mats	(47,680		)	(43,418		)
	52,863			56,923
Property, plant and equipment, net	$	303,654		$	307,632