Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2017

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		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
Foreign currency translation adjustment and    other		1,593		503		104		17		1,409			3,626
Goodwill		440,666		230,544		268,209		117,607		317,114			1,374,140
Accumulated goodwill impairment		—		—		—		—		(194,139	)		(194,139	)
Goodwill, net at March 31, 2017	$	442,259	$	231,047	$	268,313	$	117,624	$	124,384		$	1,183,627