Derivative Instruments and Hedging Activity - Offsetting of Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts of Recognized Assets	$ 2,539	$ 1,592
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets presented in the statement of Financial Position	2,539	1,592
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	(575)	(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	1,964	1,550
Gross Amounts of Recognized Liabilities	1,135	242
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities presented in the statement of Financial Position	1,135	242
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	(575)	(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	$ 560	$ 200

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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