Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Components of Goodwill and Other Intangible Assets

The components of goodwill and other intangible assets at December 31, 2017 and 2016 are presented below:

	December31,
	2017		2016
Goodwill	$	385,292	$	373,117
Other intangible assets (net of accumulated    amortization)		6,072		8,907
	$	391,364	$	382,024

Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill for the years ended December 31, 2017, 2016 and 2015 are as follows:

	Year Ended December 31,
	2017		2016			2015
Balance, January 1	$	373,117	$	320,761		$	335,402
Business acquisitions		-		54,631			-
Foreign currency translation adjustments		12,175		(2,275	)		(14,641	)
Balance, December 31	$	385,292	$	373,117		$	320,761

Gross Cost and Accumulated Amortization of Other Intangible Assets

The gross cost and accumulated amortization of other intangible assets as of December 31, 2017 and 2016, by major intangible asset category, are as follows:

	December 31, 2017						December 31, 2016
	Gross Cost		Accumulated Amortization		Net Carrying Amount		Gross Cost		Accumulated Amortization		Net Carrying Amount
Success/incentive fees	$	35,422	$	29,723	$	5,699	$	35,259	$	26,984	$	8,275
Management fees, customer relationships and    non-compete agreements		33,749		33,376		373		33,728		33,096		632
	$	69,171	$	63,099	$	6,072	$	68,987	$	60,080	$	8,907

Estimated Future Amortization Expense

Estimated future amortization expense is as follows:

Year Ending December 31,	Amortization Expense (a)
2018	$	2,941
2019		1,577
2020		1,554
Total amortization expense	$	6,072

(a) Approximately 35% of intangible asset amortization is attributable to a noncontrolling interest.