CONCENTRATION OF CREDIT RISK (Narrative) (Details)	12 Months Ended
Dec. 31, 2019 USD ($) markets	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
FDIC insured amount \| $	$ 250,000
Number of primary markets (in markets) \| markets	3
Revenue Benchmark [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	0.00%	0.00%
UNITED STATES \| Revenue Benchmark [Member] \| Customers located in the United States
Concentration Risk [Line Items]
Concentration risk, percentage	94.00%	95.00%	88.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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