EMPLOYEE BENEFITS (Fair Value of Plan Assets) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	$ 106,600	$ 102,800	$ 92,219
Fixed Maturity Securities - Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,894	9,035
Redeemable Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	3,744	2,254
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	58,613	58,223
Core Plus Bond Separate Account Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,605	6,417
U.S. Property Separate Account Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	11,252	9,895
U.S. Property Separate Account Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	11,252	9,895	$ 8,763
Arbitrage Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	7,856	7,637
Recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	97,583	94,287
Recurring [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	64,976	61,303
Recurring [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	21,355	23,089
Recurring [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	11,252	9,895
Recurring [Member] | Fixed Maturity Securities - Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,894	9,035
Recurring [Member] | Fixed Maturity Securities - Corporate Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Fixed Maturity Securities - Corporate Bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,894	9,035
Recurring [Member] | Fixed Maturity Securities - Corporate Bonds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Redeemable Preferred Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	3,744	2,254
Recurring [Member] | Redeemable Preferred Stock [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	3,744	2,254
Recurring [Member] | Redeemable Preferred Stock [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Redeemable Preferred Stock [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	58,613	58,223
Recurring [Member] | Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	58,613	58,223
Recurring [Member] | Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Equity Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Core Plus Bond Separate Account Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,605	6,417
Recurring [Member] | Core Plus Bond Separate Account Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Core Plus Bond Separate Account Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	6,605	6,417
Recurring [Member] | Core Plus Bond Separate Account Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | U.S. Property Separate Account Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	11,252	9,895
Recurring [Member] | U.S. Property Separate Account Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | U.S. Property Separate Account Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | U.S. Property Separate Account Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	11,252	9,895
Recurring [Member] | Arbitrage Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	7,856	7,637
Recurring [Member] | Arbitrage Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Arbitrage Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	7,856	7,637
Recurring [Member] | Arbitrage Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	2,619	826
Recurring [Member] | Money Market Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	2,619	826
Recurring [Member] | Money Market Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	0	0
Recurring [Member] | Money Market Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets measured at fair value	$ 0	$ 0