INCOME TAXES - Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Deferred tax liabilities:
Fixed assets	$ (39,376)	$ (33,056)
Intangible assets	(57,939)	(80,565)
Others	(14,879)	(12,544)
Total deferred tax liabilities	(112,194)	(126,165)
Deferred tax assets:
Fixed assets	67,980	65,155
Intangible assets	7,442	11,237
Deferred compensation	13,864	13,475
Inventory valuation	11,082	6,952
Provision for doubtful accounts	4,797	3,073
Net operating loss and other carryforwards	1,944,782	2,133,097
Others	243,016	236,916
Total deferred tax assets	2,292,963	2,469,905
Valuation allowances	(2,083,082)	(2,259,956)
Total deferred tax assets, net of valuation allowances	209,881	209,949
Net deferred tax asset	97,687	83,784
The net deferred tax asset is classified as follows:
Long-term asset	164,611	165,319
Long-term liability	(66,924)	$ (81,535)
Deferred tax asset associated with tax loss and tax credit carryforwards of indefinite duration	2,000,000
Valuation allowance relating to deferred tax assets	54,700
Tax losses and other carryforwards	2,037,092
Undistributed earnings of subsidiaries	1,600,000
2020 - 2025
The net deferred tax asset is classified as follows:
Tax losses and other carryforwards	606,378
2026 - 2031
The net deferred tax asset is classified as follows:
Tax losses and other carryforwards	444,040
2032 and post
The net deferred tax asset is classified as follows:
Tax losses and other carryforwards	295,361
Indefinite
The net deferred tax asset is classified as follows:
Tax losses and other carryforwards	691,313
Singapore | Subsidiaries
The net deferred tax asset is classified as follows:
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	150,000
China | Subsidiaries
The net deferred tax asset is classified as follows:
Undistributed foreign earnings that applicable foreign withholding taxes have been provided	32,800
Deferred tax liability on undistributed foreign earnings	$ 2,000