PENSION AND OTHER SAVINGS PLANS - Income Statement Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 100
Components of net periodic benefit cost:
Service cost	0	$ 0	$ 0
Interest cost	153	$ 168	152
Expected return on plan assets	0		0
Settlements and curtailments	0	$ 0	0
Prior service cost (credit)	0	0	0
Actuarial loss	118	97	112
Total net periodic benefit cost	271	265	264
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	5,600
Components of net periodic benefit cost:
Service cost	1,760	2,425	2,346
Interest cost	7,282	7,963	6,209
Expected return on plan assets	(10,033)	(10,796)	(8,770)
Settlements and curtailments	(1,683)	4,585	0
Prior service cost (credit)	8	0	0
Actuarial loss	2,840	1,217	3,377
Total net periodic benefit cost	$ 174	$ 5,394	$ 3,162