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Goodwill (Tables) | 9 Months Ended
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Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following table presents changes in goodwill in the accompanying Consolidated Balance Sheet (in thousands):
| December 31, 2020 |  | September 30, 2021
Goodwill at the beginning of the period | $ | 398,292 |  |  | $ | 392,978 |
Net increase in goodwill related to acquisitions | 14,054 |  |  | — |
Decrease in goodwill related to divestitures | (5,736) |  |  | (1,006) |
Decrease in goodwill related to impairments | (13,632) |  |  | — |
Goodwill at the end of the period | $ | 392,978 |  |  | $ | 391,972 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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