Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Carrying Amounts of Goodwill by Operating Segment

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, 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
Foreign currency translation adjustment and other	(902		)	1,244		294		60		2,512			3,208
Balance at March 31, 2018
Goodwill	453,914			234,963		269,289		117,800		326,184			1,402,150
Accumulated goodwill impairment	—			—		—		—		(194,139		)	(194,139		)
Goodwill, net at March 31, 2018	$	453,914		$	234,963	$	269,289	$	117,800	$	132,045		$	1,208,011

Schedule of Future Amortization Expense Intangible Assets

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

Year	As of March 31, 2018 (1)
2018 (remaining)	$	6,086
2019	7,702
2020	7,538
2021	6,900
2022	5,012
Thereafter	3,552
	$	36,790

⁽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.