FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 5) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at beginning of year	$ 180,007
Balance at end of year	180,749	$ 180,007
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance at beginning of year	27,071	27,820
Purchases	1,000	1,750
Sales/settlements	(5,335)	(2,300)
Unrealized gain	124	(199)
Realized (loss) gain	0	0
Balance at end of year	$ 22,860	$ 27,071