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Intangible Assets | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Intangible Assets (a) Indefinite-lived intangible assets Indefinite-lived intangible assets are recorded in Intangible Assets, net on the Consolidated Balance Sheets and include renewable investment advisory contracts ($204.1 million and $73.9 million at December 31, 2018 and December 31, 2017, respectively) and trade names ($50.1 million and $1.9 million at December 31, 2018 and December 31, 2017, respectively). (b) Finite-lived intangible assets Finite-lived intangible assets represent customer relationships and consist of the following at December 31:
(in thousands) |  | 2018 |  |  | 2017 |
Cost |  | $ | 96,598 |  |  | $ | 6,300 |
Accumulated Amortization |  | (11,203 | ) |  | (5,202 | )
Carrying Value |  | $ | 85,395 |  |  | $ | 1,098 |
The increase of $90.3 million in the cost of the finite-lived intangible assets at December 31, 2018 as compared to December 31, 2017 primarily relates to the Hermes Acquisition. See Note (3) for additional information regarding the Hermes Acquisition. Amortization expense for finite-lived intangible assets was $6.2 million, $0.6 million and $1.0 million in 2018, 2017 and 2016, respectively, and was recorded as operating expense in Other expense on the Consolidated Statements of Income. Expected aggregate annual amortization expense for finite-lived intangible assets in each of the five succeeding years assuming no new acquisitions or impairments is $11.4 million for 2019 and $10.9 million for each of the years 2020, 2021, 2022 and 2023.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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