PENSION AND OTHER SAVING PLAN - Balance Sheet Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amounts recognized in the accompanying balance sheet consist of:
Accumulated other comprehensive loss	$ 65,644	$ 75,781	$ 32,547	$ 122,246
Amounts recognized in accumulated other comprehensive loss consist of:
Accumulated other comprehensive loss (gain)	65,644	75,781	32,547	$ 122,246
Pension [Member]
Change in benefit obligation:
Net benefit obligation at beginning of year	206,966	155,075
Liability acquired	0	36,087
Service cost	1,760	2,425	2,346
Interest cost	7,282	7,963	6,209
Actuarial loss (gain)	(11,514)	32,505
Benefits and expenses paid	(17,974)	(15,119)
Settlements and curtailments	(1,559)	(10,862)
Plan amendments	0	207
Foreign currency exchange rate changes	(3,532)	(1,315)
Net benefit obligation at end of year	181,429	206,966	155,075
Change in plan assets:
Fair value of plan assets at beginning of year	160,947	134,149
Assets acquired	0	36,616
Actual return on plan assets	(2,379)	14,392
Employer contributions	3,727	4,812
Settlements	124	(12,795)
Foreign currency exchange rate changes	(3,308)	(1,108)
Fair value of plan assets at end of year	141,137	160,947	134,149
Unfunded status at end of year	(40,292)	(46,019)
Amounts recognized in the accompanying balance sheet consist of:
Noncurrent asset, included in Other assets	1,082	0
Current liability	0	0
Noncurrent liability	(41,374)	(46,019)
Accumulated other comprehensive loss	33,313	34,249
Net amount recognized at end of year	(6,979)	(11,770)
Amounts recognized in accumulated other comprehensive loss consist of:
Net actuarial loss	33,236	34,164
Prior service cost	77	85
Accumulated other comprehensive loss (gain)	33,313	34,249
SERP [Member]
Change in benefit obligation:
Net benefit obligation at beginning of year	4,129	3,640
Liability acquired	0	0
Service cost	0	0	0
Interest cost	153	168	152
Actuarial loss (gain)	(108)	704
Benefits and expenses paid	(372)	(383)
Settlements and curtailments	0	0
Plan amendments	0	0
Foreign currency exchange rate changes	0	0
Net benefit obligation at end of year	3,802	4,129	3,640
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Assets acquired	0	0
Actual return on plan assets	0	0
Employer contributions	372	383
Settlements	0	0
Foreign currency exchange rate changes	0	0
Fair value of plan assets at end of year	0	0	$ 0
Unfunded status at end of year	(3,802)	(4,129)
Amounts recognized in the accompanying balance sheet consist of:
Noncurrent asset, included in Other assets	0	0
Current liability	(368)	(368)
Noncurrent liability	(3,434)	(3,760)
Accumulated other comprehensive loss	1,589	1,815
Net amount recognized at end of year	(2,213)	(2,313)
Amounts recognized in accumulated other comprehensive loss consist of:
Net actuarial loss	1,589	1,815
Prior service cost	0	0
Accumulated other comprehensive loss (gain)	$ 1,589	$ 1,815