INVESTMENTS, SCHEDULED MATURITIES AND REALIZED GAINS AND LOSSES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Available-for-sale securities, gross realized gains	$ 808,000	$ 0	$ 0
Proceeds from sales of available-for-sale securities	1,000,000
Available-for-sale securities, gross realized losses	0	0	$ 0
Debt Maturities Fair Value [Abstract]
2017	0
2018 — 2021	0
2022 — 2026	0
2027 and thereafter	9,952,000
Available-for-sale investments	$ 9,952,000	$ 15,507,000