LONG-TERM BORROWINGS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Long-term borrowings	$ 45,000	$ 55,000
Due 2020, 1.62% to1.95% [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage		1.62%
Due 2020, 1.62% to1.95% [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage		1.95%
Due 2021, 1.42% to 1.58% [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.42%	1.42%
Due 2021, 1.42% to 1.58% [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.58%	1.58%
Due 2022, 2.34% [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.34%	2.34%
Due 2020, 1.62% to 1.95% [Member]
Long-term borrowings		$ 10,000
Due 2021, 1.42% to 1.58% [Member]
Long-term borrowings	$ 10,000	10,000
Due 2022, 2.34% [Member]
Long-term borrowings	10,000	10,000
Due 2023, 2.96%[Member]
Long-term borrowings	$ 3,000	$ 3,000
Debt Instrument, Interest Rate, Stated Percentage	2.96%	2.96%
Due 2024, 1.68% [Member]
Long-term borrowings	$ 20,000	$ 20,000
Debt Instrument, Interest Rate, Stated Percentage	1.68%	1.68%
Due 2028, 5.14% [Member]
Long-term borrowings	$ 2,000	$ 2,000
Debt Instrument, Interest Rate, Stated Percentage	5.14%	5.14%