FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at beginning of year	$ 185,981
Balance at end of year	180,007	$ 185,981
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at beginning of year	27,820	25,624
Purchases	1,750	1,500
Sales/settlements	(2,300)	(420)
Unrealized gain	(199)	1,117
Realized (loss) gain	0	(1)
Balance at end of year	$ 27,071	$ 27,820