Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

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, 2017 and 2016 consisted of the following:



	December 31
	2017			2016
	(In thousands)
Land	$	175,243		$	174,323
Buildings	677,827			673,687
Leasehold improvements	83,366			82,284
Machinery and equipment	1,867,168			1,921,436
Construction in progress	29,952			24,362
	2,833,556			2,876,092
Less accumulated depreciation	(1,739,492		)	(1,712,241		)
Total	$	1,094,064		$	1,163,851

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 to 10 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(1)		Over the terms of the related debt

(1)

Deferred financing costs associated with our receivables securitization facility and senior secured credit facility are recorded as assets in the identifiable intangible and other assets, net line of our Consolidated Balance Sheets. Beginning on January 1, 2016, we adopted ASU No. 2015-03, Imputation of Interest - Simplifying the Presentation of Debt Issuance Costs. Upon our adoption of ASU No. 2015-03, deferred financing costs associated with our senior notes due 2023 were reclassified from other assets to a reduction to the carrying amount of the liability on our Consolidated Balance Sheets and retroactively applied to prior periods. All of our deferred financing costs are amortized to interest expense over the terms of the related debt.