BENEFIT PLANS - RECONCILIATION FOR THE PLAN ASSETS CATEGORIZED AS LEVEL 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	$ 142,000
Fair value of plan assets at end of year	156,800	$ 142,000
Level 3
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	13,800	14,100
Relating to assets still held at the reporting date	2,100	(500)
Acquisitions/Divestitures		12,700
Purchases, sales and settlements, net	1,900	1,700
Transfers in and/or (out)	(200)
Effect of exchange rate changes	(900)	(1,500)
Fair value of plan assets at end of year	29,400	13,800
Level 3 | Insurance Contracts Member
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	10,300	11,900
Relating to assets still held at the reporting date	2,100	(600)
Acquisitions/Divestitures		12,700
Purchases, sales and settlements, net	1,000	300
Transfers in and/or (out)	(200)
Effect of exchange rate changes	(800)	(1,300)
Fair value of plan assets at end of year	25,100	10,300
Level 3 | Hedge Funds [Member]
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	3,200	1,800
Relating to assets still held at the reporting date	0	100
Acquisitions/Divestitures		0
Purchases, sales and settlements, net	900	1,400
Transfers in and/or (out)	0
Effect of exchange rate changes	(100)	(100)
Fair value of plan assets at end of year	4,000	3,200
Level 3 | Real Estate [Member]
Change in Plan Assets. Level 3 [Roll Forward]
Fair value of plan assets at beginning of year	300	400
Relating to assets still held at the reporting date	0	0
Acquisitions/Divestitures		0
Purchases, sales and settlements, net	0	0
Transfers in and/or (out)	0
Effect of exchange rate changes	0	(100)
Fair value of plan assets at end of year	$ 300	$ 300