Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Property Plant and Equipment, Estimated Useful Life

Depreciation is calculated using the straight-line method typically over the following range of estimated useful lives of the assets:



Asset		Useful Life
Buildings		15 to 40 years
Machinery and equipment		3 to 20 years
Leasehold improvements		Over the shorter of their estimated useful lives or the terms of the applicable lease agreements

Property, plant and equipment as of December 31, 2015 and 2014 consisted of the following:



	December 31
	2015			2014
	(In thousands)
Land	$	174,620		$	174,654
Buildings	666,697			646,098
Leasehold improvements	76,985			76,389
Machinery and equipment	1,850,012			1,809,037
Construction in progress	32,116			34,587
	2,800,430			2,740,765
Less accumulated depreciation	(1,626,293		)	(1,568,169		)
Total	$	1,174,137		$	1,172,596

Schedule of Intangible and Other Assets, Estimated Useful Life

Goodwill and Intangible Assets — Identifiable intangible assets, other than indefinite-lived trademarks, are typically amortized over the following range of estimated useful lives:



Asset		Useful Life
Customer relationships		5 to 15 years
Finite-lived trademarks		5 years
Customer supply contracts		Over the shorter of the estimated useful lives or the terms of the agreements
Noncompetition agreements		Over the shorter of the estimated useful lives or the terms of the agreements
Deferred financing costs		Over the terms of the related debt