DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES Notional Amounts (Details) (Not Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Foreign currency exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 0	[1]	$ 1,950	[1]
Foreign currency option contracts [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	0	[1]	4,000	[1]
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 180,658	[1]	$ 183,851	[1]
Fuel hedge contracts [Member]
Derivatives, Fair Value [Line Items]
Notional Amount (in barrels)	13,000	[1]	38,000	[1]

[1] All notional amounts are stated in thousands of dollars except fuel contracts which are denominated in thousands of barrels.