RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Obligations and Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in benefit obligations
Benefit obligations at beginning of year	$ 941,442	$ 1,033,725
Service cost	19,062	23,188	21,538
Interest cost	42,485	37,225	41,584
Plan participants' contributions	215	221
Plan amendments	45	1,623
Actuarial (gain) loss	117,881	(91,851)
Defined Benefit Plan, Benefits Paid	60,582	59,296
Settlement/curtailment	(7,172)	(1,390)
Currency translation	(7,905)	(2,003)
Benefit obligations at end of year	1,045,471	941,442	1,033,725
Change in plan assets
Fair value of plan assets at beginning of year	939,995	813,897
Actual return on plan assets	108,060	101,044
Employer contributions	27,550	85,456
Plan participants' contributions	215	221
Benefits paid	(59,196)	(57,644)
Settlement	0	(1,390)
Currency translation	(5,687)	(1,589)
Fair value of plan assets at end of year	1,010,937	939,995	813,897
Net amount recognized
Funded status at end of year	(34,534)	(1,447)
Unrecognized net loss	316,296	258,781
Unrecognized prior service cost	(1,930)	(2,547)
Unrecognized transition assets, net	45	26
Net amount recognized	$ 279,877	$ 254,813