DERIVATIVES (INCOME STATEMENT CLASSIFICATION) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Designated as Hedging Instruments [Member] | Option and Forward Contracts [Member] | Cash Flow [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in other comprehensive income - effective portion, net of tax:	$ 5,331	$ (1,662)	$ 14,902	$ (3,765)
Amount and location of net gain or (loss) reclassified from accumulated OCI to income - effective portion: Revenue	1,367	2,216	2,016	9,131
Amount and location of net gain or (loss) reclassified from accumulated OCI to income - effective portion: Interest expense	0	0	0	0
Designated as Hedging Instruments [Member] | Interest Rate [Member] | Cash Flow [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in other comprehensive income - effective portion, net of tax:	(386)	(842)	(862)	(1,170)
Amount and location of net gain or (loss) reclassified from accumulated OCI to income - effective portion: Revenue	0	0	0	0
Amount and location of net gain or (loss) reclassified from accumulated OCI to income - effective portion: Interest expense	(381)	0	(564)	0
Not Designated as Hedging Instruments [Member] | Option and Forward Contracts [Member] | Cash Flow [Member] | Cost of Services [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount and location of net gain or (loss) recognized in the Consolidated Statement of Comprehensive Income	0	0	0	0
Not Designated as Hedging Instruments [Member] | Option and Forward Contracts [Member] | Cash Flow [Member] | Other income (expense), net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount and location of net gain or (loss) recognized in the Consolidated Statement of Comprehensive Income	0	0	0	0
Not Designated as Hedging Instruments [Member] | Option and Forward Contracts [Member] | Fair Value [Member] | Cost of Services [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount and location of net gain or (loss) recognized in the Consolidated Statement of Comprehensive Income	0	0	0	0
Not Designated as Hedging Instruments [Member] | Option and Forward Contracts [Member] | Fair Value [Member] | Other income (expense), net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount and location of net gain or (loss) recognized in the Consolidated Statement of Comprehensive Income	544	(1,189)	4,399	(686)
Not Designated as Hedging Instruments [Member] | Leases | Embedded Derivative [Member] | Cost of Services [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount and location of net gain or (loss) recognized in the Consolidated Statement of Comprehensive Income	7	10	259	132
Not Designated as Hedging Instruments [Member] | Leases | Embedded Derivative [Member] | Other income (expense), net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount and location of net gain or (loss) recognized in the Consolidated Statement of Comprehensive Income	$ 0	$ 0	$ 0	$ 0