Derivatives - Schedule of Derivative Gain (Loss) (Details) - Not Designated as Hedging Instrument - Mortgage banking income - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	$ (118)	$ (1,294)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	(482)	(1,533)
Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	$ 364	$ 239