SCHEDULE IV - REINSURANCE (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SCHEDULE IV - REINSURANCE [Abstract]
Direct premiums										$ 570,959	$ 562,364	$ 470,158
Ceded to other companies	[1]									124,446	131,080	145,201
Assumed from other companies										775	1,596	3,188
Net		$ 111,357	$ 110,288	$ 115,631	$ 110,012	$ 118,671	$ 96,807	$ 111,940	$ 105,462	$ 447,288	$ 432,880	$ 328,145
% of amount assumed to net										0.20%	0.40%	1.00%
Retrocessions associated with premiums assumed from other companies										$ 0	$ 0	$ 0

[1] Included in Ceded to Other Companies is $0 for each of 2019, 2018 and 2017 relating to retrocessions associated with premiums assumed from other companies. Percentage of Amount Assumed to Net above considers the impact of this retrocession.