FAIR VALUE (Held-to-Maturity Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in valuation inputs or changes in assumptions	$ 0		$ 0
Unobservable inputs reconciliation, transfers	0	$ 0
US Government Obligations and Authorities, Corporate and International Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities, fair value	4,261			$ 4,331
US Government Obligations and Authorities, Corporate and International Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities, fair value	3,439			3,453
US Government Obligations and Authorities, Corporate and International Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities, fair value	$ 822			$ 878