RETIREMENT ANNUITY AND GUARANTEED CONTINUOUS EMPLOYMENT PLANS (Obligations and Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Change in benefit obligations
Benefit obligations at beginning of year	$ 991,979	$ 851,948
Service cost	21,538	17,331	15,371
Interest cost	41,584	44,161	42,730
Plan participants' contributions	334	365
Plan amendments	(3,681)	0
Actuarial loss	70,015	121,800
Benefits paid	(86,722)	(40,345)
Settlement/curtailment	(3,946)	(2,434)
Currency translation	2,624	(847)
Benefit obligations at end of year	1,033,725	991,979	851,948
Change in plan assets
Fair value of plan assets at beginning of year	749,456	726,474
Actual return on plan assets	83,156	29,470
Employer contributions	68,029	33,994
Plan participants' contributions	334	365
Benefits paid	(85,238)	(37,960)
Settlement	(3,798)	(2,415)
Currency translation	1,958	(472)
Fair value of plan assets at end of year	813,897	749,456	726,474
Net amount recognized
Funded status at end of year	(219,828)	(242,523)
Unrecognized net loss	422,042	408,474
Unrecognized prior service cost	(4,101)	(515)
Unrecognized transition assets, net	26	41
Net amount recognized	$ 198,139	$ 165,477