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Goodwill (Tables) | 9 Months Ended
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Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following table presents changes in goodwill in the accompanying Consolidated Balance Sheet for the year ended December 31, 2019 and the nine months ended September 30, 2020 (in thousands):
| December 31, 2019 |  | September 30, 2020
Goodwill at the beginning of the period | $ | 303,887 |  |  | $ | 398,292 |
Net increase in goodwill related to acquisitions | 99,344 |  |  | 14,210 |
Decrease in goodwill related to divestitures | (4,939) |  |  | (4,387) |
Decrease in goodwill related to impairments | — |  |  | (13,632) |
Goodwill at the end of the period | $ | 398,292 |  |  | $ | 394,483 |

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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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