Property, Plant and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

6) Property, Plant and Equipment

		December 31,
	Estimated Useful Life	2015		2014
Land owned		$	30,884	$	7,548
Land under capital lease			1,340		2,097
Buildings and improvements owned	15-40 years		61,142		52,641
Buildings under capital lease	20 years		3,956		6,225
Machinery and equipment	3-12 years		432,841		408,299
Construction in process			16,049		21,027
			546,212		497,837
Less - accumulated depreciation			227,244		219,395
Property, plant and equipment, net		$	318,968	$	278,442

During the years ended December 31, 2015 and 2014 we acquired $59.1 million and $168.5 million in property, plant and equipment with the two acquisition during 2015 and four acquisitions completed during 2014. (See Note 2 of the Notes to Consolidated Financial Statements).

For the years ended December 31, 2015, 2014, and 2013, depreciation expense was $31.5 million, $ 20.8 million and $17.0 million, respectively.