Rendering

Component: (Network and Table)
Network
2313301 - Disclosure - Goodwill and Acquired Client Relationships (Tables)
(http://www.amg.com/role/GoodwillAndAcquiredClientRelationshipsTables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001004434 (http://www.sec.gov/CIK)
Goodwill and Intangible Assets Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Goodwill and Intangible Assets Disclosure [Abstract]
 
Schedule of Changes in Goodwill
The following tables present the change in Goodwill and components of Acquired client relationships, net of the Company’s consolidated Affiliates:
 
 
Goodwill
 
 
Institutional
 
Mutual Fund
 
High Net Worth
 
Total
Balance, as of December 31, 2014
 
$
1,159.1

 
$
1,125.3

 
$
368.4

 
$
2,652.8

Goodwill acquired
 
9.2

 
—

 
55.1

 
64.3

Foreign currency translation
 
(27.0
)
 
(5.8
)
 
(15.9
)
 
(48.7
)
Balance, as of December 31, 2015
 
$
1,141.3

 
$
1,119.5

 
$
407.6

 
$
2,668.4

Goodwill acquired
 
—

 
—

 
—

 
—

Foreign currency translation
 
(5.1
)
 
(37.0
)
 
1.8

 
(40.3
)
Balance, as of December 31, 2016
 
$
1,136.2

 
$
1,082.5

 
$
409.4

 
$
2,628.1

  
Schedule of Changes in, and the Components of, Acquired Client Relationships
 
 
Acquired Client Relationships
 
 
Definite-lived
 
Indefinite-lived
 
Total
 
 
Gross Book
Value
 
Accumulated
Amortization
 
Net Book
Value
 
Net Book
Value
 
Net Book
Value
Balance, as of December 31, 2014
 
$
1,255.1

 
$
(565.0
)
 
$
690.1

 
$
1,088.3

 
$
1,778.4

New Investments
 
52.5

 
—

 
52.5

 
—

 
52.5

Intangible amortization and impairments
 
—

 
(115.4
)
 
(115.4
)
 
—

 
(115.4
)
Foreign currency translation
 
(5.8
)
 
—

 
(5.8
)
 
(23.3
)
 
(29.1
)
Balance, as of December 31, 2015
 
$
1,301.8

 
$
(680.4
)
 
$
621.4

 
$
1,065.0

 
$
1,686.4

New Investments
 
—

 
—

 
—

 
—

 
—

Intangible amortization and impairments
 
—

 
(107.7
)
 
(107.7
)
 
(2.5
)
 
(110.2
)
Foreign currency translation
 
(11.8
)
 
—

 
(11.8
)
 
(67.0
)
 
(78.8
)
Balance, as of December 31, 2016
 
$
1,290.0

 
$
(788.1
)
 
$
501.9

 
$
995.5

 
$
1,497.4