SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Percentage of premium written in Iowa and contiguous states (in hundredths)	37.00%
Percentage of net premiums written subject to policyholder dividends (in hundredths)	22.00%
Investment securities on deposit	$ 11,000	$ 11,200
Average annual expense for accounts receivable charge-offs over past ten years	$ 362