OTHER LIABILITIES: (Details) - USD ($)	Mar. 31, 2021	Mar. 31, 2020
Other Liabilities Disclosure [Abstract]
Uncertain tax positions	$ 26,156,000	$ 25,007,000
Long-term lease liabilities	4,158,000	11,449,000
Restructuring accruals	4,510,000	6,839,000
Other	7,565,000	9,700,000
Other liabilities	$ 42,389,000	$ 52,995,000