SUMMARY OF ACCOUNTING POLICIES - Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
ASSETS
Contract assets	$ 282,444	$ 216,202
Inventories	3,785,073	3,722,854
Other current assets	660,085	854,790
LIABILITIES AND SHAREHOLDERS’ EQUITY
Other current liabilities	1,590,060	1,426,075
Accumulated deficit	$ (2,902,410)	$ (3,012,012)