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Derivative Instruments and Hedging Activity - Offsetting of Derivative Assets and Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Derivative [Line Items]    
Gross Amounts of Recognized Assets $ 334 $ 2,539
Gross Amounts Offset in the Statement of Financial Position 0 0
Net Amounts of Assets presented in the statement of Financial Position 334 2,539
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments (334) (575)
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
Gross Amounts of Recognized Liabilities 6,931 1,135
Gross Amounts Offset in the Statement of Financial Position 0 0
Net Amounts of Liabilities presented in the statement of Financial Position 6,931 1,135
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments (334) (575)
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 $ 6,597 $ 560