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Derivative Instruments - Fair Value Measured on Recurring Basis (Table) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivatives Fair Value [Line Items]
Derivatives	$ 0	$ 467
Quoted Prices in Active Markets for Identical Assets (Level 1)
Derivatives Fair Value [Line Items]
Derivatives	0	0
Significant Other Observable Inputs (Level 2)
Derivatives Fair Value [Line Items]
Derivatives	0	467
Significant Unobservable Inputs (Level 3)
Derivatives Fair Value [Line Items]
Derivatives	$ 0	$ 0

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.

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