FAIR VALUE MEASUREMENTS Fair Values Measured on Recurring Basis (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity portion of the current maturity	$ 6,900,000
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	260,738,000		280,596,000
Restricted cash	6,569,000	[1]	10,559,000	[1]
Current maturities of long-term debt	(10,000,000)		(150,000,000)
Long-term debt	(1,646,337,000)		(1,120,052,000)
Carrying Value | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	(7,113,000)	[2]	0	[2]
Carrying Value | Fair Value, Measurements, Recurring [Member] | Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fuel contracts	(109,000)	[2]	0	[2]
Carrying Value | Fair Value, Measurements, Recurring [Member] | Foreign currency exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency option contracts	1,296,000	[2]	0	[2]
Carrying Value | Fair Value, Measurements, Recurring [Member] | Foreign currency option contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency option contracts	613,000	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	260,738,000		280,596,000
Restricted cash	6,569,000	[1]	10,559,000	[1]
Current maturities of long-term debt	0		0
Long-term debt	0		0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	0	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 | Fair Value, Measurements, Recurring [Member] | Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fuel contracts	0	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 | Fair Value, Measurements, Recurring [Member] | Foreign currency exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency option contracts	0	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 | Fair Value, Measurements, Recurring [Member] | Foreign currency option contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency option contracts	0	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0		0
Restricted cash	0	[1]	0	[1]
Current maturities of long-term debt	(16,900,000)	[3]	(150,000,000)
Long-term debt	(1,739,813,000)		(1,250,341,000)
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	(7,113,000)	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 | Fair Value, Measurements, Recurring [Member] | Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fuel contracts	(109,000)	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 | Fair Value, Measurements, Recurring [Member] | Foreign currency exchange contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency option contracts	1,296,000	[2]	0	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 | Fair Value, Measurements, Recurring [Member] | Foreign currency option contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency option contracts	$ 613,000	[2]	$ 0	[2]

[1] Restricted cash is recorded in “Other Assets” and represents the proceeds from LKE sales deposited with a third-party intermediary.

[2] See Note 9 — Derivative Financial Instruments and Hedging Activities for information regarding the Balance Sheet classification of the Company’s derivative financial instruments.

[3] The fair market value of current maturities of long-term-term debt represents the value of the debt and equity associated with the early redemption of a portion of the Senior Exchangeable Notes due 2015. The Company has a hedge agreement that offsets the $6.9 million equity portion of the current maturity. See Note 16 — Debt for more information regarding the exchange of the notes.