INCOME TAXES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
INCOME TAXES [Abstract]
Effective income tax rate, UK (in hundredths)	24.50%
Current [Abstract]
Federal	$ (69,934,000)	$ (39,708,000)	$ 16,959,000
Foreign	23,931,000	15,368,000	32,402,000
State	100,000	566,000	(908,000)
Total current provision (benefit)	(45,903,000)	(23,774,000)	48,453,000
Deferred	26,074,000	18,115,000	43,481,000
Total provision	(19,829,000)	(5,659,000)	91,934,000
Income tax expense (benefit), income tax reconciliation [Abstract]
Tax at statutory rate	44,950,000	45,528,000	125,837,000
Increase (decrease) due to [Abstract]
Capitalized interest transactions	(39,204,000)	0	0
Foreign rate differential	(29,223,000)	(46,720,000)	(25,711,000)
Deferred intercompany gain (loss)	(8,749,000)	(12,629,000)	0
Change in valuation allowance	2,806,000	0	0
Prior period adjustments	4,482,000	(1,398,000)	0
Unrecognized tax benefits	2,463,000	3,895,000	0
Extraterritorial income exclusion	(45,000)	(522,000)	0
Excess compensation	1,432,000	1,447,000	0
Domestic production activities	0	0	(6,372,000)
Other, net	1,259,000	4,740,000	(1,820,000)
Total provision	(19,829,000)	(5,659,000)	91,934,000
Deferred tax assets, current [Abstract]
Accrued employee benefit plan costs	27,011,000	26,519,000
U.S. net operating loss	0	0
U.K. net operating loss	0	0
Other	5,567,000	4,874,000
Total deferred tax assets, current	32,578,000	31,393,000
Less: valuation allowance, current	0	0
Deferred tax assets, net of valuation allowance, current	32,578,000	31,393,000
Deferred tax liabilities, current [Abstract]
Property, plant and equipment	0	0
Other	5,950,000	4,370,000
Total deferred tax liabilities	5,950,000	4,370,000
Net deferred tax asset (liability)	26,628,000	27,023,000
Deferred tax assets, noncurrent [Abstract]
Accrued employee benefit plan costs	118,961,000	72,467,000
U.S. net operating loss	30,623,000	64,495,000
U.K. net operating loss	7,889,000	14,722,000
Other	21,154,000	10,861,000
Total deferred tax assets, noncurrent	178,627,000	162,545,000
Less: valuation allowance, noncurrent	(17,528,000)	(14,722,000)
Deferred tax assets, net of valuation allowance, noncurrent	161,099,000	147,823,000
Deferred tax liabilities, noncurrent [Abstract]
Property, plant and equipment	590,334,000	615,319,000
Other	44,637,000	8,947,000
Total deferred tax liabilities, noncurrent	634,971,000	624,266,000
Net deferred tax asset (liability), noncurrent	(473,872,000)	(476,443,000)
Operating Loss Carryforwards [Line Items]
Net unrecognized tax benefits which would reduce the Company's income tax provision if recognized	58,900,000	55,300,000	51,000,000
Statutory rate (in hundredths)	35.00%
Changes in gross unrecognized tax benefits [Abstract]
Gross unrecognized tax benefits - beginning of year	55,300,000	51,000,000	54,200,000
Gross increases - tax positions in prior period	700,000	4,300,000	0
Gross decreases - tax positions in prior period	0	0	(1,300,000)
Gross increases - current period tax positions	2,900,000	0	0
Settlements	0	0	0
Lapse of statute of limitations	0	0	(1,900,000)
Gross unrecognized tax benefit - end of year	58,900,000	55,300,000	51,000,000	54,200,000
Accrued interest on income taxes	2,500,000	2,100,000	900,000
Accrued penalties on income taxes	1,400,000	1,100,000	600,000
Tax benefit recognized				25,400,000
Estimated tax benefits deferred due to uncertainty	49,200,000
Long-term income tax receivable included in other assets	46,600,000
Long-term liability related to deferred income tax benefits	48,700,000
Income (Loss) from Continuing Operations before Income Taxes Abstract]
Income from continuing operations before income taxes, domestic	9,800,000	(1,200,000)	260,300,000
Income (loss) from continuing operations before income taxes, foreign	173,700,000	131,300,000	118,700,000
Domestic and Foreign Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Statutory rate (in hundredths)	24.50%
U.S. [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	51,800,000
Net operating loss carryforwards, expiration dates	2032
Undistributed Earnings of Foreign Subsidiaries	3,129,000,000
Statutory rate (in hundredths)		35.00%	35.00%
U.K. [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	35,700,000
Non expiring NOLs	33,900,000
Valuation allowance released against NOLs	55,600,000
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Undistributed Earnings of Foreign Subsidiaries	400,000,000
Non expiring NOLs	3,800,000
Non expiring NOLs subject to a valuation allowance	$ 2,300,000