Goodwill and Intangible Assets

As of June 30, 2018, the gross carrying value of goodwill was $2.26 billion and accumulated goodwill impairment was $2.08 billion. We recorded a goodwill impairment charge of $2.08 billion in 2011 with no goodwill impairment charges in subsequent years.

The changes in the net carrying amounts of goodwill as of June 30, 2018 and December 31, 2017 were as follows (in thousands):



Balance at December 31, 2017	$	167,535
Acquisitions(1)	23,172
Balance at June 30, 2018	$	190,707


(1)	The increase in the net carrying amount of goodwill from December 31, 2017 to June 30, 2018 is related to the Good Karma acquisition and the finalization of tax matters associated with the Uncle Matt's acquisition. See Note 3.

The net carrying amounts of our intangible assets other than goodwill as of June 30, 2018 and December 31, 2017 were as follows:



	June 30, 2018										December 31, 2017
	Acquisition Costs(1)		Impairment			Accumulated Amortization			Net Carrying Amount		Acquisition Costs		Impairment			Accumulated Amortization			Net Carrying Amount
	(In thousands)
Intangible assets with indefinite lives:
Trademarks	$	69,315	$	—		$	—		$	69,315	$	58,600	$	—		$	—		$	58,600
Intangible assets with finite lives:
Customer-related and other	83,545		—			(43,339		)	40,206		80,685		—			(41,398		)	39,287
Trademarks	230,709		(109,910		)	(66,405		)	54,394		230,709		(109,910		)	(58,189		)	62,610
Total	$	383,569	$	(109,910	)	$	(109,744	)	$	163,915	$	369,994	$	(109,910	)	$	(99,587	)	$	160,497


(1)	The increase in the carrying amount of intangible assets from December 31, 2017 to June 30, 2018 is related to an indefinite-lived trademark of $10.7 million and a finite-lived customer-related intangible of $2.9 million we recorded as a part of the Good Karma acquisition. See Note 3.

Our finite-lived trademarks will be amortized on a straight-line basis over their remaining useful lives, which range from approximately 2 to 8 years, with a weighted-average remaining useful life of approximately 5 years. Amortization expense on intangible assets for the three months ended June 30, 2018 and 2017 was $5.1 million and $5.2 million, respectively. Amortization expense on intangible assets for the six months ended June 30, 2018 and 2017 was $10.2 million and $10.3 million, respectively. The amortization of intangible assets is reported on a separate line item in our unaudited Condensed Consolidated Statements of Operations.

Estimated aggregate intangible asset amortization expense for the next five years is as follows (in millions):



2018	$	20.5
2019	20.6
2020	12.5
2021	10.8
2022	8.1