Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Changes in Carrying Amounts of Goodwill by Reportable Segment

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

	Corporate		Forensicand
	Finance &		Litigation		Economic				Strategic
	Restructuring		Consulting		Consulting		Technology		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		11,900		—		—		—		—			11,900
Foreign currency translation adjustment and    other		2,292		2,967		712		122		6,170			12,263
Balance at September 30, 2017
Goodwill		454,858		233,511		268,921		117,729		323,284			1,398,303
Accumulated goodwill impairment		—		—		—		—		(194,139	)		(194,139	)
Goodwill, net at September 30, 2017	$	454,858	$	233,511	$	268,921	$	117,729	$	129,145		$	1,204,164

Schedule of Estimated Future Amortization Expense

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

Year	As of September 30, 2017(1)
2017 (remaining)	$	2,771
2018		8,223
2019		7,561
2020		7,387
2021		6,773
Thereafter		8,473
	$	41,188

(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.