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Derivative Instruments (Fair Values Of Derivative Instruments) (Details) (Forward Currency Exchange Contracts [Member], Non-Designated Derivatives [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Forward Currency Exchange Contracts [Member] \| Non-Designated Derivatives [Member]
Derivative [Line Items]
Asset derivatives, Notional Amount	$ 86,456	$ 93,813	$ 76,671
Gross amounts of recognized assets	0	0	0
Gross amounts offset in the balance sheet	(407)	(406)	(396)
Net amounts of assets in the balance sheet	$ (407)	$ (406)	$ (396)

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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- Definition

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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