10.	Goodwill and Intangible Assets

Goodwill

Goodwill represents the excess of the cost of an acquired business over the fair value of the identifiable tangible and intangible assets acquired and liabilities assumed in a business combination. At September 30, 2018 and December 31, 2017 we had $833.5 million and $828.0 million of goodwill recorded in our Packaging segment, respectively. At both September 30, 2018 and December 31, 2017, we had $55.2 million of goodwill recorded in our Paper segment.

Changes in the carrying amount of our goodwill are as follows (dollars in millions):

	Goodwill
Balance at January 1, 2018	$	883.2
Acquisitions (a)		5.5
Balance at September 30, 2018	$	888.7

(a)	During the nine months ended September 30, 2018, the Company recorded a $5.5 million adjustment to increase the goodwill balance for the Company’s October 2017 acquisition of Sacramento Container.

Intangible Assets

Intangible assets are primarily comprised of customer relationships and trademarks and trade names.

The weighted average remaining useful life, gross carrying amount, and accumulated amortization of our intangible assets were as follows (dollars in millions):

	September 30, 2018					December 31, 2017
	Weighted Average Remaining Useful Life (in Years)	Gross Carrying Amount		Accumulated Amortization		Weighted Average Remaining Useful Life (in Years)	Gross Carrying Amount		Accumulated Amortization
Customer relationships (a)	11.2	$	491.4	$	135.5	11.8	$	497.8	$	109.8
Trademarks and trade names (a)	10.4		33.9		17.6	9.8		32.9		13.2
Other (a)	3.1		4.3		2.6	3.6		4.3		2.0
Total intangible assets (excluding goodwill)	11.1	$	529.6	$	155.7	11.7	$	535.0	$	125.0

(a)

In connection with the October 2017 acquisition of Sacramento Container, the Company recorded intangible assets of $68.4 million for customer relationships, $4.1 million for trade names, and $0.1 million for other intangibles. During the second quarter ended June 30, 2018, the Company made a $5.5 million net adjustment based on the final valuation received for the intangible assets. This adjustment resulted in a revision to the original allocations for customer relationships and trade names. As of June 30, 2018, the revised allocations for customer relationships and trade names were $61.9 million and $5.1 million, respectively.

During the three months ended September 30, 2018 and 2017, amortization expense was $10.2 million and $8.4 million, respectively. During the nine months ended September 30, 2018 and 2017, amortization expense was $30.7 million and $25.3 million, respectively.