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Goodwill and Other Intangible Assets, Net (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Goodwill by Operating Segment | A summary of changes in the carrying amount of goodwill by operating segment for the years ended December 31, 2017 and 2016 were as follows (in thousands):
|  | Financial Services |  |  | Benefits and Insurance Services |  |  | National Practices |  |  | Total Goodwill |
December 31, 2015 |  | $ | 267,485 |  |  | $ | 178,534 |  |  | $ | 1,666 |  |  | $ | 447,685 |
Additions |  |  | 3,845 |  |  |  | 35,954 |  |  |  | — |  |  |  | 39,799 |
December 31, 2016 |  | $ | 271,330 |  |  | $ | 214,488 |  |  | $ | 1,666 |  |  | $ | 487,484 |
Additions |  |  | 35,531 |  |  |  | 5,409 |  |  |  | — |  |  |  | 40,940 |
December 31, 2017 |  | $ | 306,861 |  |  | $ | 219,897 |  |  | $ | 1,666 |  |  | $ | 528,424 |
Components of Goodwill and Other Intangible Assets, Net | The components of goodwill and other intangible assets, net at December 31, 2017 and 2016 were as follows (in thousands):
|  | 2017 |  |  | 2016 |
Goodwill |  | $ | 528,424 |  |  | $ | 487,484 |
Intangibles : |  |  |  |  |  |  |  |
Client lists |  |  | 177,221 |  |  |  | 172,343 |
Other intangibles |  |  | 8,767 |  |  |  | 7,994 |
Total intangibles |  |  | 185,988 |  |  |  | 180,337 |
Total goodwill and other intangibles assets |  |  | 714,412 |  |  |  | 667,821 |
Accumulated amortization: |  |  |  |  |  |  |  |
Client lists |  |  | (97,063 | ) |  |  | (80,560 | )
Other intangibles |  |  | (4,143 | ) |  |  | (2,860 | )
Total accumulated amortization |  |  | (101,206 | ) |  |  | (83,420 | )
Goodwill and other intangible assets, net |  | $ | 613,206 |  |  | $ | 584,401 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: 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 2: 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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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: 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 + Details
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