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INCOME TAXES (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Tax at federal statutory rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 35.00% | 35.00% | 34.00%
Income (loss) before taxes | $ 5,531,000 | $ 5,686,000 | $ 3,906,000 | $ 4,662,000 | $ 4,377,000 | $ 3,843,000 | $ 3,684,000 | $ 3,995,000 | $ 3,506,000 | $ 3,109,000 | $ 2,631,000 | $ 2,270,000 |  | $ 19,785,000 | $ 15,899,000 | $ 11,516,000
Operating loss carryforwards, state | $ 12,100,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,100,000 |  |
AMT carryover |  |  |  |  | $ 869,000 |  |  |  |  |  |  |  |  |  | 869,000 |
Accumulated Foreign Subsidiary Earnings Not Previously Subject To Us Income, Foreign Cash And Certain Other Net Current Assets, Tax Rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.50% |  |
Accumulated Foreign Subsidiary Earnings Not Previously Subject To Us Income, Remaining Earnings, Tax Rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |
Provisional Amount For One Time Transitional Tax Liability And Income Tax Expense |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,100 |  |
Net Tax Expense Recognized, Related To The Tax Act |  |  |  |  |  |  |  |  |  |  |  |  |  | 582,000 |  |
Scenario, Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax at federal statutory rate |  |  |  |  |  |  |  |  |  |  |  |  | 21.00% |  |  |
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 600,000 | $ 1,060,000 | $ 859,000

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