SEGMENT INFORMATION (Physical Location and Values of Long-Lived Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	$ 219,639	$ 236,214
Ukraine
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	74,902	78,289
Belarus
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	70,700	75,422
United States
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	17,423	14,843
India
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	10,997	9,459
Poland
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	8,025	8,240
Hungary
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	5,612	5,339
Russia
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	0	16,611
Other
Long-Lived Assets by Geographical Areas [Line Items]
Long-lived assets	$ 31,980	$ 28,011