INVESTMENTS (Gross Unrealized Losses and Related Fair Values for Debt and Equity Securities, Grouped by Duration of Time in Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Gross unrealized loss position [Abstract]
Total Investments, excluding equity securities, less than 12 months, Fair Value		$ 76,371
Total Investments, excluding equity securities, Less than 12 Months, Gross Unrealized Losses		535
Total Investments, excluding equity securities, 12 months or longer, Fair Value		12,378
Total Investments, excluding equity securities, 12 months or longer, Gross Unrealized Losses		96
Total Investments, excluding equity securities, Total Fair Value		88,749
Total Investments, excluding equity securities, Total Gross Unrealized Losses		631
United States Government Obligations and Authorities
Fair value [Abstract]
Less than 12 months	$ 30,860	49,833
12 Months or Longer	82	2,218
Total	30,942	52,051
Gross unrealized losses [Abstract]
Less than 12 months	105	409
12 Months or Longer	2	17
Total	107	426
Fair Value [Abstract]
Less than 12 Months		0
12 Months or Longer, Fair Value		2,287
Total		2,287
Gross unrealized loss position [Abstract]
Less than 12 Months		0
12 Months or Longer, Accumulated Loss		39
Total		39
Obligations of States and Political Subdivisions
Fair value [Abstract]
Less than 12 months	1,679	6,810
12 Months or Longer	0	0
Total	1,679	6,810
Gross unrealized losses [Abstract]
Less than 12 months	15	22
12 Months or Longer	0	0
Total	15	22
Corporate
Fair value [Abstract]
Less than 12 months	22,669	15,872
12 Months or Longer	0	7,694
Total	22,669	23,566
Gross unrealized losses [Abstract]
Less than 12 months	319	94
12 Months or Longer	0	38
Total	319	132
International
Fair value [Abstract]
Less than 12 months	4,158	3,856
12 Months or Longer	132	179
Total	4,290	4,035
Gross unrealized losses [Abstract]
Less than 12 months	14	10
12 Months or Longer	1	2
Total	15	12
Debt Securities
Fair value [Abstract]
Less than 12 months	59,366	76,371
12 Months or Longer	214	10,091
Total	59,580	86,462
Gross unrealized losses [Abstract]
Less than 12 months	453	535
12 Months or Longer	3	57
Total	$ 456	$ 592