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Derivative Financial Instruments and Hedging Activities - Offsetting of Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$ 0	$ 161
Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	0	161
Derivative, Collateral, Obligation to Return Securities	0	(161)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	$ 0	0
Other assets | Interest rate swap
Offsetting Assets [Line Items]
Derivative assets, accrued interest, interest rate swaps		$ 1

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Derivative Asset, Accrued Interest, Interest Rate Swaps

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Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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