Derivative Financial Instruments (Derivative instruments gains and losses recognized (not designated as hedging instruments)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Gains on sale of loans held for sale | Interest rate lock commitments (mortgage)
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ (1,344)	$ (361)	$ 4,464	$ 3,471
Gains on sale of loans held for sale | Forward commitments
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	931	$ (4,237)	(1,311)	$ (662)
Other noninterest income | Undesignated interest rate swaps
Trading Activity, Gains and Losses, Net [Line Items]
Gain (Loss) Recognized	$ 269		$ (101)