INVESTMENTS - (Aging of Gross Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair value [Abstract]
Less than 12 months	$ 155,128	$ 35,685
12 months or longer	1,741	132
Total	156,869	35,817
Gross unrealized losses [Abstract]
Less than 12 months	2,912	133
12 months or longer	58	1
Total	2,970	134
United States government obligations and authorities
Fair value [Abstract]
Less than 12 months	46,038	25,521
12 months or longer	881	0
Total	46,919	25,521
Gross unrealized losses [Abstract]
Less than 12 months	672	38
12 months or longer	11	0
Total	683	38
Obligations of states and political subdivisions
Fair value [Abstract]
Less than 12 months	7,322
12 months or longer	0
Total	7,322
Gross unrealized losses [Abstract]
Less than 12 months	144
12 months or longer	0
Total	144
Corporate securities
Fair value [Abstract]
Less than 12 months	86,423	7,989
12 months or longer	860	0
Total	87,283	7,989
Gross unrealized losses [Abstract]
Less than 12 months	1,875	79
12 months or longer	47	0
Total	1,922	79
International securities
Fair value [Abstract]
Less than 12 months	15,345	2,175
12 months or longer	0	132
Total	15,345	2,307
Gross unrealized losses [Abstract]
Less than 12 months	221	16
12 months or longer	0	1
Total	$ 221	$ 17