Goodwill and other intangible assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in goodwill

The changes in the carrying amount of goodwill by segment for the year ended December 31, 2019, are as follows:

	Consumer Packaging		Display and Packaging		Paper and Industrial Converted Products		Protective Solutions		Total
Balance as of January 1, 2019	$	617,332	$	203,414	$	256,947	$	231,474	$	1,309,167
Acquisitions	75,595		—		43,427		—		119,022
Measurement period adjustments	(2,461)		—		2,246				(215)
Foreign currency translation	777		—		421		174		1,372
Balance as of December 31, 2019	$	691,243	$	203,414	$	303,041	$	231,648	$	1,429,346

Summary of other intangible assets

Details at December 31 are as follows:

	2019		2018
Other Intangible Assets, Gross:
Patents	$	26,096	$	22,509
Customer lists	632,036		548,038
Trade names	32,427		31,174
Proprietary technology	24,525		28,748
Land use rights	172		282
Other	2,125		2,093
Other Intangible Assets, Gross	$	717,381	$	632,844
Accumulated Amortization:
Patents	$	(11,669)	$	(9,539)
Customer lists	(287,831)		(246,946)
Trade names	(9,985)		(7,413)
Proprietary technology	(17,910)		(15,400)
Land use rights	(51)		(48)
Other	(1,643)		(1,461)
Accumulated Amortization	$	(329,089)	$	(280,807)
Other Intangible Assets, Net	$	388,292	$	352,037