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Derivative Financial Instruments - Derivative Offsetting (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative financial instruments, asset	$ 3,656	$ 0
Derivative assets, amounts subject to enforceable master netting arrangements	(2,490)	0
Derivative assets, net amounts	1,166	0
Derivative liabilities	3,258	9,370
Derivative liabilities, amounts subject to enforceable master netting arrangements	(2,490)	0
Derivative liabilities, net amounts	$ 768	$ 9,370

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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- 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. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details