Derivative Instruments and Hedging Activity (Details 3) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Gross Amounts of Recognized Assets	$ 4,516	$ 1,592
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets presented in the statement of Financial Position	4,516	1,592
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	(42)
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Received	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Net Amount	4,516	1,550
Gross Amounts of Recognized Liabilities	0	242
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities presented in the statement of Financial Position	0	242
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	(42)
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Received	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Net Amount	$ 0	$ 200

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