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Derivative Financial Instruments (Details 3) - Interest rate swaps - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Offsetting of financial assets and derivative assets    
Gross Amounts of Recognized Assets $ 15,204 $ 10,016
Gross Amounts Offset in the Statement of Financial Position 136 157
Net Amounts of Assets Presented in the Statement of Financial Position 15,068 9,859
Net Amount $ 15,068 $ 9,859