RETIREMENT PLAN AND POST-RETIREMENT BENEFITS, Fair Value of Plan Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Fair value of plan assets [Abstract]
Defined benefit plan contribution	$ 22,100,000		$ 40,600,000
United States Pension Plans of US Entity, Defined Benefit [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	841,047,000		811,480,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	49,956,000	[1]	44,226,000	[1]
United States Pension Plans of US Entity, Defined Benefit [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	230,240,000	[2]	153,435,000	[3]
United States Pension Plans of US Entity, Defined Benefit [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	63,936,000		110,837,000
United States Pension Plans of US Entity, Defined Benefit [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	75,000		64,000
United States Pension Plans of US Entity, Defined Benefit [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,382,000		842,000
United States Pension Plans of US Entity, Defined Benefit [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	497,455,000	[4]	438,127,000	[4]
United States Pension Plans of US Entity, Defined Benefit [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	41,626,000		55,037,000
United States Pension Plans of US Entity, Defined Benefit [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(47,000)		(92,000)
United States Pension Plans of US Entity, Defined Benefit [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(43,576,000)	[5]	9,004,000	[5]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	215,806,000		279,100,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	376,000	[1]	4,795,000	[1]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	63,538,000	[2]	52,204,000	[3]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	63,936,000		110,837,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	75,000		64,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,382,000		842,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	125,165,000	[4]	98,311,000	[4]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	4,957,000		3,135,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(47,000)		(92,000)
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(43,576,000)	[5]	9,004,000	[5]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	625,241,000		532,380,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	49,580,000	[1]	39,431,000	[1]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	166,702,000	[2]	101,231,000	[3]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	372,290,000	[4]	339,816,000	[4]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	36,669,000		51,902,000
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[5]	0	[5]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[1]	0	[1]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[2]	0	[3]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[4]	0	[4]
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Pension Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[5]	0	[5]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	102,333,000		93,196,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	3,340,000	[1]	2,861,000	[1]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	48,877,000	[2]	45,048,000	[3]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,757,000		2,409,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	2,000		1,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	38,000		18,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	48,374,000	[4]	41,469,000	[4]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,144,000		1,196,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(1,000)		(2,000)
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(1,198,000)	[5]	196,000	[5]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	59,160,000		55,811,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,978,000	[1]	105,000	[1]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	44,296,000	[2]	42,848,000	[3]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,757,000		2,409,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	2,000		1,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	38,000		18,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	12,152,000	[4]	10,168,000	[4]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	136,000		68,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(1,000)		(2,000)
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	(1,198,000)	[5]	196,000	[5]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	43,173,000		37,385,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,362,000	[1]	2,756,000	[1]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	4,581,000	[2]	2,200,000	[3]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	36,222,000	[4]	31,301,000	[4]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	1,008,000		1,128,000
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[5]	0	[5]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[1]	0	[1]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[2]	0	[3]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Equity Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Preferred Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0	[4]	0	[4]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Fixed Income Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | International Future Contracts [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | U S Convertible Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0		0
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | Administrative Trust [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	$ 0	[5]	$ 0	[5]

[1] Cash and cash equivalents consist of investment in commingled funds that are primarily comprised of money market holdings and marketable securities, U.S. Treasury bills and commercial paper valued and redeemable at cost.

[2] This category includes approximately 27% small and mid-cap and 73% broad market domestic equity investments.

[3] This category includes approximately 26% small and mid-cap and 74% broad market domestic equity investments.

[4] Level 1 investments are comprised of fixed income securities that primarily invest in U.S. Treasury bonds. Level 2 investments consist of commingled funds that track the Barclays Capital Long Government and Corporate Credit Index and the Barclays Capital Aggregate US Fixed Income Index.

[5] The administrative trust net assets/liabilities are primarily comprised of amounts payable to and from brokers for sold and purchased securities.