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Derivatives (Notional Amounts) (Details) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Sells INR/Buys USD Forward USD ($)	Mar. 31, 2014 Sells INR/Buys USD Forward RSD	Mar. 31, 2014 Sells euro (EUR)/Buys USD Forward USD ($)	Mar. 31, 2014 Sells euro (EUR)/Buys USD Forward EUR (€)	Mar. 31, 2014 Sells pound sterling (GBP)/Buys USD Forward USD ($)	Mar. 31, 2014 Sells pound sterling (GBP)/Buys USD Forward GBP (£)	Mar. 31, 2014 Sells Canadian dollar (CAD)/Buys USD Forward USD ($)	Mar. 31, 2014 Sells Canadian dollar (CAD)/Buys USD Forward CAD	Mar. 31, 2014 Interest Rate Cap USD ($)	Mar. 31, 2014 Interest Rate Swap USD ($)	Oct. 31, 2012 Interest Rate Swap USD ($)
Derivative [Line Items]
Notional Amount	$ 7,614	456,000	$ 99,479	€ 72,200	$ 6,335	£ 3,800	$ 37,564	41,500	$ 500,000	$ 27,831	$ 28,000
Maturity	Jun. 30, 2015	Jun. 30, 2015	Apr. 03, 2014	Apr. 03, 2014	Apr. 03, 2014	Apr. 03, 2014	Apr. 03, 2014	Apr. 03, 2014
Fixed Rate									1.00%
Variable Rate										2.00%
Fixed Rate										3.47%

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCapInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeVariableInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Date the foreign currency exchange rate derivatives mature or expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_MaturityOfForeignCurrencyDerivatives1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration