Derivative Financial Instruments (Derivative Instruments Gains and Losses Recognized (Not Designated as Hedging Instruments)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Net gains on sale of loans held for sale | Interest rate lock commitments (mortgage)
Trading Activity, Gains and Losses, Net [Line Items]
Year-to-Date Gain(Loss) Recognized	$ (3,269)	$ (1,479)
Net gains on sale of loans held for sale | Forward commitments
Trading Activity, Gains and Losses, Net [Line Items]
Year-to-Date Gain(Loss) Recognized	(170)	(2,466)
Net gains on sale of loans held for sale | Forward commitments
Trading Activity, Gains and Losses, Net [Line Items]
Year-to-Date Gain(Loss) Recognized	(161)	34
Other noninterest income | Undesignated interest rate swaps
Trading Activity, Gains and Losses, Net [Line Items]
Year-to-Date Gain(Loss) Recognized	$ 339	$ 388