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GOODWILL AND INTANGIBLE ASSETS - Schedule of good will (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Goodwill [Roll Forward] |  |
Goodwill as of beginning | $ 133,082 | $ 132,035
Goodwill from current year business combinations | 59,257 | 1,047
Impairment charges | 5,360 |
Goodwill as of ending | 186,979 | 133,082
Rhode Island |  |
Goodwill [Roll Forward] |  |
Goodwill as of beginning | 83,101 | 83,101
Goodwill from current year business combinations | 0 | 0
Impairment charges | 0 |
Goodwill as of ending | 83,101 | 83,101
Mid-Atlantic |  |
Goodwill [Roll Forward] |  |
Goodwill as of beginning | 1,047 | 0
Goodwill from current year business combinations | 0 | 1,047
Impairment charges | 0 |
Goodwill as of ending | 1,047 | 1,047
Southeast |  |
Goodwill [Roll Forward] |  |
Goodwill as of beginning | 48,934 | 48,934
Goodwill from current year business combinations | 6,053 | 0
Impairment charges | 0 |
Goodwill as of ending | 54,987 | 48,934
West |  |
Goodwill [Roll Forward] |  |
Goodwill as of beginning | 0 | 0
Goodwill from current year business combinations | 53,204 | 0
Impairment charges | 5,360 |
Goodwill as of ending | $ 47,844 | $ 0

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + 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 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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