Derivative Instruments - Gross and Net Amounts of Derivative Assets and Liabilities (Details 4) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value of Assets
Gross derivative amounts recognized in the balance sheet	$ 468	$ 2,155
Gross derivative amounts not offset in the balance sheet that are eligible for offsetting	(67)	(26)
Net amount	401	2,129
Fair Value of Liabilities
Gross derivative amounts recognized in the balance sheet	783	861
Gross derivative amounts not offset in the balance sheet that are eligible for offsetting	(67)	(26)
Net amount	$ 716	$ 835

Fair value, before 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 elected not to be offset.

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Fair value of liability associated with 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.

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