PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - CHANGES IN BENEFIT OBLIGATIONS, AND PLAN ASSETS AND FUNDED STATUS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in Accumulated Other Comprehensive Income (Loss), net of tax:
Net amounts recognized in AOCI	$ 207,169	$ 254,648
Pension Benefits
Change in benefit obligation
Projected benefit obligation at beginning of year	1,169,424	1,260,895
Service cost	23,075	28,300	$ 26,935
Interest cost	41,875	44,179	48,886
Plan amendments	(43,065)	67
Actuarial (gain) loss	15,804	(51,064)
Curtailment	0	(2,693)
Settlement	(59,784)	(57,193)
Divestiture	0	(4,047)
Currency translation and other	1,416	(11,456)
Benefits paid	(30,427)	(37,564)
Projected benefit obligation at end of year	1,118,318	1,169,424	1,260,895
Change in plan assets
Fair value of plan assets at beginning of year	1,041,902	1,136,943
Actual return on plan assets	49,012	(19,804)
Employer contributions	21,580	32,898
Settlement	(59,784)	(57,193)
Divestiture	0	(2,485)
Currency translation and other	1,393	(10,893)
Benefits paid	(30,427)	(37,564)
Fair value of plan assets at end of year	1,023,676	1,041,902	1,136,943
Funded status at end of year	(94,642)	(127,522)
Amounts recognized in the Consolidated Balance Sheets:
Other assets	39	0
Accrued liabilities	(28,994)	(4,841)
Other long-term liabilities	(65,687)	(122,681)
Total	(94,642)	(127,522)
Amounts recognized in Accumulated Other Comprehensive Income (Loss), net of tax:
Actuarial net (loss) gain	(243,228)	(264,570)
Net prior service credit (cost)	28,360	4,267
Net amounts recognized in AOCI	(214,868)	(260,303)
Other Benefits
Change in benefit obligation
Projected benefit obligation at beginning of year	255,617	294,064
Service cost	299	542	706
Interest cost	9,731	10,187	11,696
Plan amendments	0	0
Actuarial (gain) loss	(2,998)	(26,887)
Curtailment	0	292
Settlement	0	0
Divestiture	0	0
Currency translation and other	314	(2,206)
Benefits paid	(20,117)	(20,375)
Projected benefit obligation at end of year	242,846	255,617	294,064
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	20,117	20,375
Settlement	0	0
Divestiture	0	0
Currency translation and other	0	0
Benefits paid	(20,117)	(20,375)
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	(242,846)	(255,617)
Amounts recognized in the Consolidated Balance Sheets:
Other assets	0	0
Accrued liabilities	(22,576)	(24,205)
Other long-term liabilities	(220,270)	(231,412)
Total	(242,846)	(255,617)
Amounts recognized in Accumulated Other Comprehensive Income (Loss), net of tax:
Actuarial net (loss) gain	9,264	7,574
Net prior service credit (cost)	(1,565)	(1,919)
Net amounts recognized in AOCI	$ 7,699	$ 5,655