Derivatives - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 285	$ 77
Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets	956	261
Derivative liabilities	151	77
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative assets	1,417	873
Retail interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative liabilities	134
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative assets	1,568	950
Derivative liabilities	285	77
Not Designated as Hedging Instrument | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets	151	77
Derivative liabilities	151	77
Not Designated as Hedging Instrument | Interest rate swaps | Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	151	77
Not Designated as Hedging Instrument | Interest rate swaps | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	151	77
Not Designated as Hedging Instrument | Interest rate lock commitments | Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	1,417	873
Not Designated as Hedging Instrument | Retail interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative liabilities	134	0
Not Designated as Hedging Instrument | Retail interest rate contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 134	$ 0