Foreign Currency Derivatives - Offsetting of Derivative Assets (Details) (Foreign exchange contract, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Foreign exchange contract
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$ 10,454	$ 6,748
Gross Amounts of Assets Offset In the Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Assets Presented In the Condensed Consolidated Balance Sheets	10,454	6,748
Gross Amounts of Assets Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(5,259)	(5,643)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Pledged to Return cash	0	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount	$ 5,195	$ 1,105

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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