Derivative Financial Instruments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) position	Dec. 31, 2018 USD ($) position
Derivatives and other information
Changes in fair value of interest rate swaps	$ 0
Interest Rate Swap | Designated as Hedging Instrument
Derivatives and other information
Notional amount	$ 25,000	$ 25,000
Position | position	3	3
Derivative asset	$ 182	$ 289
Matched interest rate swap with borrower | Not designated as hedges
Derivatives and other information
Notional amount	$ 45,785	$ 45,961
Position | position	8	8
Derivative asset	$ 589	$ 216
Derivative Liabilities	789	1,391
Matched interest rate swap with counterparty | Not designated as hedges
Derivatives and other information
Notional amount	$ 45,785	$ 45,961
Position | position	8	8
Derivative asset	$ 789	$ 1,391
Derivative Liabilities	589	216
Collateral Pledged	390
Interest rate lock commitments/IRLCs | Not designated as hedges
Derivatives and other information
Notional amount	$ 95,921	$ 44,324
Position | position	380	181
Derivative asset	$ 1,396	$ 636