Derivatives (Schedule of Derivative Assets Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Fair Value of derivative assets, current	$ 1,110	$ 3,234
Fair Value of derivative liabilities, current	(600)	(1,310)
Derivative Assets (Liabilities), at Fair Value, Net	491	1,924
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair Value of derivative assets, current	287	724
Derivative Liability, Noncurrent	(19)	0
Fair Value of derivative liabilities, current	(313)	(105)
Non Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Fair Value of derivative assets, current	823	2,510
Fair Value of derivative liabilities, current	(287)	(1,205)
Derivative Assets (Liabilities), at Fair Value, Net	$ 536

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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or 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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or 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, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details