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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Schedule of income before income tax, domestic and foreign |
|  | 2017 |  |  | 2016 |  |  | 2015 |
United States |  | $ | 22,695 |  |  | $ | 25,038 |  |  | $ | 19,850 |
Foreign |  |  | 7,644 |  |  |  | 6,039 |  |  |  | 5,013 |
Total |  | $ | 30,339 |  |  | $ | 31,077 |  |  | $ | 24,863 |
Schedule of provision for income taxes |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 4,871 |  |  | $ | 5,016 |  |  | $ | 5,778 |
Federal – Deemed Repatriation |  |  | 1,102 |  |  |  | — |  |  |  | — |
State |  |  | (1,435 | ) |  |  | 955 |  |  |  | 913 |
Foreign |  |  | 3,653 |  |  |  | 1,965 |  |  |  | 1,623 |
|  |  | 8,191 |  |  |  | 7,936 |  |  |  | 8,314 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (919 | ) |  |  | 3,057 |  |  |  | 548 |
State |  |  | 150 |  |  |  | 205 |  |  |  | 47 |
Foreign |  |  | (99 | ) |  |  | (43 | ) |  |  | (22 | )
|  |  | (868 | ) |  |  | 3,219 |  |  |  | 573 |
|  | $ | 7,323 |  |  | $ | 11,155 |  |  | $ | 8,887 |
Schedule of effective income tax rate reconciliation |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Federal statutory tax rate |  |  | 35.0 | % |  |  | 35.0 | % |  |  | 35.0 | %
State taxes, net of federal tax benefit |  |  | 1.0 | % |  |  | 3.8 | % |  |  | 3.0 | %
Excess of (decreases in) foreign tax over US tax on foreign income |  |  | 2.9 | % |  |  | (0.5 | )% |  |  | (1.1 | )%
Remeasurement of deferred taxes under TCJA |  |  | (7.7 | )% |  |  | — | % |  |  | — | %
Deemed repatriation tax |  |  | 3.6 | % |  |  | — | % |  |  | — | %
Domestic tax deductions and credits |  |  | (3.1 | )% |  |  | (2.7 | )% |  |  | (1.2 | )%
Release of unrecognized tax benefit |  |  | (5.8 | )% |  |  | — | % |  |  | — | %
Other |  |  | (1.8 | )% |  |  | 0.2 | % |  |  | — | %
Effective tax rate |  |  | 24.1 | % |  |  | 35.8 | % |  |  | 35.7 | %
Schedule of deferred income tax assets and liabilities |
|  | 2017 |  |  | 2016 |
Deferred tax assets: |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 181 |  |  | $ | 58 |
Accruals and reserves |  |  | 1,673 |  |  |  | 2,552 |
Other |  |  | 644 |  |  |  | 259 |
Total deferred tax assets |  |  | 2,498 |  |  |  | 2,869 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Property, plant, and equipment |  |  | 3,579 |  |  |  | 3,610 |
Investments in foreign subsidiaries |  |  | — |  |  |  | 1,215 |
Total deferred tax liabilities |  |  | 3,579 |  |  |  | 4,825 |
Valuation Allowance |  |  | (44 | ) |  |  | (37 | )
Net deferred tax asset/(liability) |  | $ | (1,125 | ) |  | $ | (1,993 | )
Schedule of activity of the unrecognized tax benefits |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Unrecognized tax benefits – January 1 |  |  | 1,037 |  |  |  | 792 |  |  |  | 526 |
Gross increases – tax positions in prior period |  |  | 120 |  |  |  | 245 |  |  |  | 266 |
Gross decreases – tax positions in prior period |  |  | (1,157 | ) |  |  | — |  |  |  | — |
Unrecognized tax benefits – December 31 |  | $ | — |  |  | $ | 1,037 |  |  | $ | 792

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