Derivatives - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 236	$ 77
Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets	784	261
Derivative liabilities	133	77
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative assets	1,323	873
Retail interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative liabilities	103
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative assets	1,456	950
Derivative liabilities	236	77
Not Designated as Hedging Instrument | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets	133	77
Derivative liabilities	133	77
Not Designated as Hedging Instrument | Interest rate swaps | Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	133	77
Not Designated as Hedging Instrument | Interest rate swaps | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	133	77
Not Designated as Hedging Instrument | Interest rate lock commitments | Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	1,323	873
Not Designated as Hedging Instrument | Retail interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative liabilities	103	0
Not Designated as Hedging Instrument | Retail interest rate contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 103	$ 0