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FAIR VALUE MEASUREMENTS - Fair Value on a Recurring Basis (Details) - Interest rate swap | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) item | Dec. 31, 2017 USD ($)
Cash flow hedges |  |
Interest rate derivatives |  |
Number of interest rate derivatives held | item | 27 |
Number of mortgage loans outstanding | item | 27 |
Notional Amount | $ 117,348,000 |
Weighted average maturity | 5 years 10 months 24 days |
Weighted average annual interest rate (as a percent) | 4.13% |
Cash flow hedges | Minimum |  |
Interest rate derivatives |  |
Fixed Interest Rate (as a percent) | 3.02% |
Cash flow hedges | Maximum |  |
Interest rate derivatives |  |
Fixed Interest Rate (as a percent) | 5.38% |
Recurring | Level 2 |  |
Financial assets: |  |
Derivative financial instruments | $ 2,399,000 | $ 1,615,000
Financial liabilities: |  |
Derivative financial instruments | $ 505,000 | $ 1,492,000

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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