Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 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	(2,454		)	(1,168		)	(213		)	(38		)	(2,198		)	(6,071		)
Balance at June 30, 2018
Goodwill	452,362			232,551			268,782			117,702			321,474			1,392,871
Accumulated goodwill impairment	—			—			—			—			(194,139		)	(194,139		)
Goodwill, net at June 30, 2018	$	452,362		$	232,551		$	268,782		$	117,702		$	127,335		$	1,198,732

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 June 30, 2018 (1)
2018 (remaining)	$	3,884
2019	7,437
2020	7,274
2021	6,731
2022	4,939
Thereafter	3,514
	$	33,779

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