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Derivative Financial Instruments and Hedging Activities - Offsetting of Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 1,118	$ 375
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	1,118	375
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	(161)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	(990)	0
Net Amount	128	214
Interest rate swap | Other liabilities
Offsetting Liabilities [Line Items]
Accrued interest on derivative liability interest swaps	3	3
Counterparty A
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	1,118	375
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Liabilities Presented in the Statements of Condition	1,118	375
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	(161)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	(990)	0
Net Amount	$ 128	$ 214

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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