FAIR VALUE MEASUREMENTS Fair Values Measured on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 156,071		$ 199,644
Restricted cash	23,633	[1]	68,944	[1]
Current maturities of long-term debt	(114,319)		(112,500)
Long-term debt	(1,393,887)		(1,461,724)
Carrying Value [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	(5,145)	[2]	(4,659)	[2]
Carrying Value [Member] | Fair Value, Measurements, Recurring [Member] | Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fuel contracts	(159)	[2]	160	[2]
Carrying Value [Member] | 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	2,532	[2]	940	[2]
Carrying Value [Member] | 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	1,243	[2]	467	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	156,071		199,644
Restricted cash	23,633	[1]	68,944	[1]
Current maturities of long-term debt	0		0
Long-term debt	0		0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member]
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	(122,187)		(119,614)
Long-term debt	(1,451,984)		(1,489,810)
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	(5,145)	[2]	(4,659)	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fuel contracts	(159)	[2]	160	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member] | 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	2,532	[2]	940	[2]
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member] | 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	$ 1,243	[2]	$ 467	[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.