Goodwill and Other Intangible Assets

Goodwill

The table below summarizes the changes in the carrying amount of goodwill by reportable segment.



	Corporate Finance & Restructuring			Forensic and Litigation Consulting			Economic Consulting			Technology			Strategic Communications			Total
Balance at December 31, 2016
Goodwill	$	440,666		$	230,544		$	268,209		$	117,607		$	317,114		$	1,374,140
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at December 31, 2016	440,666			230,544			268,209			117,607			122,975			1,180,001
Acquisitions ⁽¹⁾	11,900			—			—			—			—			11,900
Foreign currency translation adjustment and other	2,250			3,175			786			133			6,558			12,902
Balance at December 31, 2017
Goodwill	454,816			233,719			268,995			117,740			323,672			1,398,942
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at December 31, 2017	454,816			233,719			268,995			117,740			129,533			1,204,803
Sale of business ⁽²⁾	—			—			—			(20,928		)	—			(20,928		)
Foreign currency translation adjustment and other	(3,819		)	(2,182		)	(448		)	(89		)	(5,021		)	(11,559		)
Balance at December 31, 2018
Goodwill	450,997			231,537			268,547			96,723			318,651			1,366,455
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at December 31, 2018	$	450,997		$	231,537		$	268,547		$	96,723		$	124,512		$	1,172,316


⁽¹⁾	During the year ended December 31, 2017, we made an initial payment of $8.9 million at closing to acquire a restructuring business within our Corporate Finance & Restructuring segment. We recorded $11.9 million in goodwill as a result of the acquisition. We have included the results of the acquired business' operations in the Corporate Finance & Restructuring segment since the acquisition date.


⁽²⁾	During the year ended December 31, 2018, we sold a business within our Technology segment for proceeds of $50.3 million. We wrote off $20.9 million in goodwill as a result of the sale.

Other Intangible Assets

Other intangible assets were as follows:



		December 31, 2018						December 31, 2017
	Weighted Average Useful Life in Years	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizing intangible assets
Customer relationships ⁽¹⁾	14.3	$	99,080	$	71,036	$	28,044	$	117,192	$	80,523	$	36,669
Acquired software	9.8	3,107		1,618		1,489		3,264		1,383		1,881
	14.2	102,187		72,654		29,533		120,456		81,906		38,550
Non-amortizing intangible assets
Trade names ⁽¹⁾	Indefinite	5,100		—		5,100		5,600		—		5,600
Total		$	107,287	$	72,654	$	34,633	$	126,056	$	81,906	$	44,150


⁽¹⁾	During the year ended December 31, 2018, we sold a business and related intangible assets within our Technology segment.

Other intangible assets with finite lives are amortized over their estimated useful lives. We recorded amortization expense of $8.2 million, $10.6 million and $10.3 million during the years ended December 31, 2018, 2017 and 2016, respectively.

We estimate our future amortization expense for our intangible assets with a finite life to be as follows:



	As of December 31, 2018 ⁽¹⁾
Year	As of December 31, 2018 ⁽¹⁾
2019	$	7,291
2020	7,176
2021	6,657
2022	4,913
2023	1,693
Thereafter	1,803
	$	29,533


⁽¹⁾	Actual amortization expense to be reported in future periods could differ from these estimates as a result of new intangible asset acquisitions, changes in useful lives, or other relevant factors or changes.