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LEASES - As Lessor (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Lessor |  |  |  |  |  |  |  |  |  |  |
Operating Lease, option to extend |  |  |  |  |  |  |  |  | true |  |
Operating Lease, option to terminate |  |  |  |  |  |  |  |  | true |  |
Practical expedient, single lease component | true |  |  |  |  |  |  |  | true |  |
Components of lease revenues |  |  |  |  |  |  |  |  |  |  |
Fixed lease revenues |  |  |  |  |  |  |  |  | $ 70,788,000 | $ 65,042,000 | $ 63,425,000
Variable lease revenues |  |  |  |  |  |  |  |  | 12,084,000 | 11,863,000 | 11,594,000
Lease revenues |  |  |  |  |  |  |  |  | 82,872,000 | 76,905,000 | 75,019,000
Amortization of intangibles relating to leases, net |  |  |  |  |  |  |  |  | 914,000 | 1,849,000 | 897,000
Revenues | $ 22,448,000 | $ 20,414,000 | $ 20,719,000 | $ 21,155,000 | $ 20,270,000 | $ 19,570,000 | $ 19,752,000 | $ 19,534,000 | 84,736,000 | 79,126,000 | 75,916,000
Rental income, net |  |  |  |  |  |  |  |  |  |  |
Components of lease revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 83,786,000 | 78,754,000 | 75,916,000
Tenant reimbursements |  |  |  |  |  |  |  |  |  |  |
Components of lease revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 10,443,000 | 8,456,000 | 7,672,000
ASU 2016-02 | Adjustment | Tenant reimbursements |  |  |  |  |  |  |  |  |  |  |
Components of lease revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 10,443,000 | $ 8,456,000 | $ 7,672,000

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- Definition Amount of non-cash amortization of intangible asset (liability) for above and below market leases. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Indicates (true false) whether practical expedient is elected to account for lease component and nonlease component as single lease component. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL117410129-209981 + Details
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- Definition Indicates (true false) whether lessor has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919359-209981 + Details
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- Definition Indicates (true false) whether lessor has option to terminate operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919359-209981 + Details
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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=77888421&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=118952077&loc=SL77927221-108306 + Details
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