DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES Balance Sheet Location (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	$ (5,218)	[1]	$ (4,873)	[1]
Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(167)	[1]	(214)	[1]
Other non-current liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(5,051)	[1]	(4,659)	[1]
Prepaid and other current assets [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	2,572	[1]	1,781	[1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	19,625	[2]	32,300	[2]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member] | Prepaid and other current assets [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	1,726	[3]	915	[1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency option contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	46,000	[2]	38,000	[2]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency option contracts [Member] | Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(100)	[1]	(214)	[1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency option contracts [Member] | Prepaid and other current assets [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	846	[1]	673	[1]
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0	[2]	1,950	[2]
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts [Member] | Prepaid and other current assets [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	0	[1]	25	[1]
Not Designated as Hedging Instrument [Member] | Foreign currency option contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0	[2]	4,000	[2]
Not Designated as Hedging Instrument [Member] | Foreign currency option contracts [Member] | Prepaid and other current assets [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	0	[1]	8	[1]
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	180,658	[2]	183,851	[2]
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other non-current liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(5,051)	[3]	(4,659)	[1]
Not Designated as Hedging Instrument [Member] | Fuel hedge contracts [Member] | Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative liability	(67)	[3]	0	[1]
Not Designated as Hedging Instrument [Member] | Fuel hedge contracts [Member] | Prepaid and other current assets [Member]
Derivatives, Fair Value [Line Items]
Fair value, derivative asset	$ 0	[1]	$ 160	[1]

[1] See Note 11 — Fair Value Measurements for further information on the fair value of our derivatives including their classification within the fair value hierarchy.

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

[3] See Note 10 — Derivative Financial Instruments and Hedging Activities for information regarding the Balance Sheet classification of the Company’s derivative financial instruments.