Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Assets
Gross position	$ 15,314	$ 5,238
Impact of master netting agreement	(9,278)	(4,045)
Derivative values with impact of master netting agreements (as carried on balance sheet)	6,036	1,193
Cash collateral (held) pledged	(1,070)	(900)
Net position	4,966	293
Other Liabilities
Gross position	(30,497)	(28,688)
Impact of master netting agreement	9,278	4,045
Derivative values with impact of master netting agreements (as carried on balance sheet)	21,219	24,643
Cash collateral (held) pledged	54,845	72,478
Net position	$ 33,626	$ 47,835

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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