EARNINGS PER SHARE AND ACCUMULATED OTHER COMPREHENSIVE INCOME - Accumulated Other Comprehensive Income (Details) $ in Thousands	3 Months Ended
Jun. 30, 2018 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated other comprehensive loss - beginning balance	$ (286,094)
Net current period other comprehensive income	(27,824)
Accumulated other comprehensive loss - ending balance	(313,918)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated other comprehensive loss - beginning balance	(286,094)
Other comprehensive income before reclassification	(26,210)
Reclassified from accumulated other comprehensive income	(1,614)
Net current period other comprehensive income	(27,824)
Foreign exchange rate impact	0
Accumulated other comprehensive loss - ending balance	(313,918)
Currency Translation Adjustments \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated other comprehensive loss - beginning balance	(79,066)
Other comprehensive income before reclassification	(29,172)
Reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	(29,172)
Foreign exchange rate impact	(14,025)
Accumulated other comprehensive loss - ending balance	(122,263)
Pension Liability Adjustments \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated other comprehensive loss - beginning balance	(206,682)
Other comprehensive income before reclassification	0
Reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	0
Foreign exchange rate impact	14,025
Accumulated other comprehensive loss - ending balance	(192,657)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Accumulated other comprehensive loss - beginning balance	(346)
Other comprehensive income before reclassification	2,962
Reclassified from accumulated other comprehensive income	(1,614)
Net current period other comprehensive income	1,348
Foreign exchange rate impact	0
Accumulated other comprehensive loss - ending balance	$ 1,002

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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

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