SIGNIFICANT ACCOUNTING POLICIES - Benefits and Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SIGNIFICANT ACCOUNTING POLICIES
Amount of previously paid premiums received	$ 2,514	$ 23,527
Premium paid for split dollar life insurance agreements	$ 0	$ 0	$ 0