SEGMENT REPORTING Schedule of Gross Premiums Written by Line of Business (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
Segment Reporting Information [Line Items]
Gross premiums written	$ 98,470	$ 110,607	$ 152,340	$ 162,560	$ 135,143	$ 115,154	$ 142,109	$ 175,125	$ 523,977	$ 567,531	$ 692,651
Gross premiums written									100.00%	100.00%	100.00%
Commercial
Segment Reporting Information [Line Items]
Gross premiums written									$ 14,165	$ 10,487	$ 12,256
Gross premiums written									2.70%	1.80%	1.80%
Motor
Segment Reporting Information [Line Items]
Gross premiums written									$ 59,402	$ 76,425	$ 71,188
Gross premiums written									11.30%	13.50%	10.20%
Personal
Segment Reporting Information [Line Items]
Gross premiums written									$ 12,390	$ 14,118	$ 49,491
Gross premiums written									2.40%	2.50%	7.20%
Total Property
Segment Reporting Information [Line Items]
Gross premiums written									$ 85,957	$ 101,030	$ 132,935
Gross premiums written									16.40%	17.80%	19.20%
General Liability
Segment Reporting Information [Line Items]
Gross premiums written									$ 2,401	$ 1,429	$ 4,753
Gross premiums written									0.50%	0.30%	0.70%
Motor Liability
Segment Reporting Information [Line Items]
Gross premiums written									$ 233,591	$ 291,690	$ 281,551
Gross premiums written									44.60%	51.40%	40.60%
Professional Liability
Segment Reporting Information [Line Items]
Gross premiums written									$ (448)	$ 3,068	$ 8,703
Gross premiums written									(0.10%)	0.50%	1.30%
Workers' Compensation
Segment Reporting Information [Line Items]
Gross premiums written									$ 50,369	$ 24,101	$ 24,803
Gross premiums written									9.60%	4.30%	3.60%
Multi-line
Segment Reporting Information [Line Items]
Gross premiums written									$ 76,461	$ 57,497	$ 123,340
Gross premiums written									14.60%	10.10%	17.80%
Total Casualty
Segment Reporting Information [Line Items]
Gross premiums written									$ 362,374	$ 377,785	$ 443,150
Gross premiums written									69.20%	66.60%	64.00%
Accident & Health
Segment Reporting Information [Line Items]
Gross premiums written									$ 39,175	$ 69,605	$ 66,800
Gross premiums written									7.50%	12.20%	9.60%
Financial
Segment Reporting Information [Line Items]
Gross premiums written									$ 23,087	$ 16,611	$ 48,380
Gross premiums written									4.40%	2.90%	7.00%
Marine
Segment Reporting Information [Line Items]
Gross premiums written									$ 160	$ 394	$ 0
Gross premiums written									0.00%	0.10%	0.00%
Other Specialty
Segment Reporting Information [Line Items]
Gross premiums written									$ 13,224	$ 2,106	$ 1,386
Gross premiums written									2.50%	0.40%	0.20%
Total Other
Segment Reporting Information [Line Items]
Gross premiums written									$ 75,646	$ 88,716	$ 116,566
Gross premiums written									14.40%	15.60%	16.80%