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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2017
Accounting Policies [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The components of accumulated other comprehensive loss as recorded on the accompanying Consolidated Balance Sheets were as follows:
|  | 2017 |  | 2016
|  | (Dollars in thousands)
Foreign currency translation adjustments |  | $ | (4,186 | ) |  | $ | (5,489 | )
Pension liability, net of tax |  |  | (13,673 | ) |  |  | (11,080 | )
Total accumulated other comprehensive loss |  | $ | (17,859 | ) |  | $ | (16,569 | )
Changes In Accumulated Other Comprehensive Loss [Table Text Block] | The following presents a tabular disclosure about changes in accumulated other comprehensive loss (dollars in thousands):
|  | Foreign Currency Translation Adjustments |  | Defined Benefit Pension Items |  | Total
Balance, December 31, 2015 |  | $ | (5,691 | ) |  | $ | (12,776 | ) |  | $ | (18,467 | )
Other comprehensive income before reclassifications |  |  | 202 |  |  |  | 765 |  |  |  | 967 |
Amounts reclassified from accumulated other comprehensive loss |  |  | — |  |  |  | 931 |  |  |  | 931 |
Net current period other comprehensive income |  |  | 202 |  |  |  | 1,696 |  |  |  | 1,898 |
Balance, December 31, 2016 |  | $ | (5,489 | ) |  | $ | (11,080 | ) |  | $ | (16,569 | )
Other comprehensive loss before reclassifications |  |  | 1,303 |  |  |  | (2,982 | ) |  |  | (1,679 | )
Amounts reclassified from accumulated other comprehensive loss |  |  | — |  |  |  | 389 |  |  |  | 389 |
Net current period other comprehensive income (loss) |  |  | 1,303 |  |  |  | (2,593 | ) |  |  | (1,290 | )
Balance, December 31, 2017 |  | $ | (4,186 | ) |  | $ | (13,673 | ) |  | $ | (17,859 | )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] | The following presents a tabular disclosure about reclassification adjustments out of accumulated other comprehensive loss during the years ended December 31, 2017 and 2016 (dollars in thousands):
|  | Amounts reclassified from accumulated other comprehensive loss for the year ended December 31, |  | Affected line item in the statement where net income is presented
|  | 2017 |  | 2016
Amortization of defined benefit pension items |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost |  | $ | (63 | ) |  | $ | (262 | )(1) |  |  | Other Expense, net |
Actuarial losses |  |  | 589 |  |  |  | 1,789 | (1) |  |  | Other Expense, net |
Total before tax |  |  | 526 |  |  |  | 1,527 |  |  |  |  |
Tax benefit |  |  | (137 | ) |  |  | (596 | ) |  |  |  |
Net of tax |  | $ | 389 |  |  | $ | 931 |  |  |  |  |
| (1) | These amounts were included in the computation of net pension expense. See Note 11 for additional details.

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