Property, Plant and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

The carrying values of property, plant and equipment were as follows:

	December 31,
	2017			2016
	(In thousands)
Land and land improvements	$	31,963		$	28,462
Buildings and leasehold improvements	148,598			136,230
Machinery and equipment	543,594			499,400
Computer equipment and software	136,509			123,909
Construction in process	46,898			35,191
Gross property, plant and equipment	907,562			823,192
Accumulated depreciation	(570,240		)	(513,901		)
Net property, plant and equipment	$	337,322		$	309,291

Depreciation Expense

We recognized depreciation expense in income from continuing operations of $45.6 million, $47.2 million, and $46.6 million in 2017, 2016, and 2015, respectively.