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Goodwill and Other Intangible Assets, Net | 12 Months Ended
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Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets, Net | Note 4. Goodwill and Other Intangible Assets, Net A summary of changes in the carrying amount of goodwill by operating segment for the years ended December 31, 2016 and 2015 were as follows (in thousands):
|  | Financial Services |  |  | Benefits and Insurance Services |  |  | National Practices |  |  | Total Goodwill |
December 31, 2014 |  | $ | 268,630 |  |  | $ | 164,935 |  |  | $ | 1,666 |  |  | $ | 435,231 |
Additions |  |  | 409 |  |  |  | 13,599 |  |  |  | — |  |  |  | 14,008 |
Divestitures |  |  | (1,554 | ) |  |  | — |  |  |  | — |  |  |  | (1,554 | )
December 31, 2015 |  | $ | 267,485 |  |  | $ | 178,534 |  |  | $ | 1,666 |  |  | $ | 447,685 |
Additions |  |  | 3,845 |  |  |  | 35,954 |  |  |  | — |  |  |  | 39,799 |
Divestitures |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
December 31, 2016 |  | $ | 271,330 |  |  | $ | 214,488 |  |  | $ | 1,666 |  |  | $ | 487,484 |
We review goodwill at least annually for impairment in accordance with FASB ASC Topic 350 “Intangibles — Goodwill and Other.” The annual impairment review was performed as of November 1, 2016. Goodwill impairment is tested at the reporting unit level. At November 1, 2016, we had five reporting units. No goodwill impairment was recognized as a result of the annual evaluation performed as of November 1, 2016. The components of goodwill and other intangible assets, net at December 31, 2016 and 2015 were as follows (in thousands):
|  | 2016 |  |  | 2015 |
Goodwill |  | $ | 487,484 |  |  | $ | 447,685 |
Intangibles : |  |  |  |  |  |  |  |
Client lists |  |  | 172,343 |  |  |  | 147,706 |
Other intangibles |  |  | 7,994 |  |  |  | 6,977 |
Total intangibles |  |  | 180,337 |  |  |  | 154,683 |
Total goodwill and other intangibles assets |  |  | 667,821 |  |  |  | 602,368 |
Accumulated amortization: |  |  |  |  |  |  |  |
Client lists |  |  | (80,560 | ) |  |  | (65,037 | )
Other intangibles |  |  | (2,860 | ) |  |  | (1,678 | )
Total accumulated amortization |  |  | (83,420 | ) |  |  | (66,715 | )
Goodwill and other intangible assets, net |  | $ | 584,401 |  |  | $ | 535,653 |
Amortization expense for client lists and other intangible assets was $16.7 million, $14.7 million and $14.5 million in 2016, 2015 and 2014, respectively. The weighted-average useful lives of total intangible assets, client lists and other intangible assets were 7.6 years, 7.5 years and 8.9 years, respectively. Other intangible assets are amortized over periods ranging from 2 to 15 years. Based on the amount of intangible assets subject to amortization at December 31, 2016, the estimated amortization expense is $17.4 million for 2017, $16.3 million for 2018, $12.1 million for 2019, $10.9 million for 2020 and $9.7 million for 2021.

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- Definition The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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