ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Balances	$ 121,693	$ 106,798	$ 119,194	$ 101,813
Balances	126,280	111,200	126,280	111,200
Accumulated Other Comprehensive Income (Loss)
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Balances	(14,047)	(9,667)	(10,531)	(8,518)
Unrealized loss on cash flow hedges	(588)	(515)	(2,051)	(806)
Amounts reclassified from AOCI	155	(49)	186	(101)
Tax effect of cash flow hedges	104	128	448	209
Foreign currency translation loss	1,932	548	(496)	(339)
Balances	(12,444)	(9,555)	(12,444)	(9,555)
Defined Benefit Plan Liability
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Balances	(1,628)	(1,006)	(1,628)	(1,006)
Balances	(1,628)	(1,006)	(1,628)	(1,006)
Cash Flow Hedges
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Balances	(1,365)	172	(277)	434
Unrealized loss on cash flow hedges	(588)	(515)	(2,051)	(806)
Amounts reclassified from AOCI	155	(49)	186	(101)
Tax effect of cash flow hedges	104	128	448	209
Balances	(1,694)	(264)	(1,694)	(264)
Foreign Currency Translation Adjustment
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Balances	(11,054)	(8,833)	(8,626)	(7,946)
Foreign currency translation loss	1,932	548	(496)	(339)
Balances	$ (9,122)	$ (8,285)	$ (9,122)	$ (8,285)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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