Property, Plant and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment consist of the following:

(In thousands)	Estimated Useful Lives	December 31 2015			December 31 2014
Land	—	$	10,932		$	15,721
Land improvements	5-20 years	15,277			15,898
Buildings and improvements (a)	5-40 years	191,356			205,409
Machinery and equipment	3-20 years	1,661,914			1,861,965
Uncompleted construction	—	36,990			87,414
Gross property, plant and equipment		1,916,469			2,186,407
Less: Accumulated depreciation		(1,352,434		)	(1,523,163		)
Property, plant and equipment, net		$	564,035		$	663,244

(a) Buildings and improvements include leasehold improvements that are amortized over the shorter of their useful lives or the initial term of the lease.

Included in the amounts are $16.0 million and $22.3 million of property, plant and equipment under capital leases at December 31, 2015 and 2014, respectively.