LONG-TERM DEBT (Narrative) (Details) - USD ($) $ in Thousands		9 Months Ended
	Feb. 22, 2018	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2018
Debt Instrument [Line Items]
Repayments of promissory note		$ 5,000	$ 0
TransRe | Monarch National Insurance Company
Debt Instrument [Line Items]
Repayments of promissory note	$ 5,000
TransRe | Monarch National Insurance Company | Interest Expense
Debt Instrument [Line Items]
Debt issuance costs (Less than $0.1 million)				$ 100