Derivative Instruments (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value of Assets
Gross derivative amounts recognized in the balance sheet	$ 802	$ 2,155
Gross derivative amounts not offset in the balance sheet that are eligible for offsetting
Gross derivative amounts not offset that are eligible for offsetting	(96)	(26)
Net amount	$ 706	$ 2,129

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_DerivativeAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant