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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2015
Goodwill [Abstract] |
Summary of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill as of December 31, 2015 and 2014 consisted of the following (in thousands):
| Year Ended December 31, 2015 | Year Ended December 31, 2014
Beginning balance | $ | 147,914 |  | $ | 143,955 |
Goodwill acquired during the year |  | 23,428 |  |  | 12,974 |
Goodwill allocated to specific assets for businesses acquired in 2013 |  | — |  |  | (9,760 | )
Goodwill adjustments for purchase price allocation of businesses acquired |  | 385 |  |  | 880 |
Goodwill written-off - closed clinics |  | (180 | ) |  | (135 | )
Ending balance | $ | 171,547 |  | $ | 147,914 |

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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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