Derivative Instruments - (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Designated as hedging instruments:
Derivative financial instruments
Derivative liabilities	$ 5,284	$ 3,847
Not designated as hedging instruments:
Derivative financial instruments
Derivative assets	12,575	3,731
Derivative liabilities	7,178	2,446
Other Assets | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative assets	3,282	2,142
Other Assets | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative assets	9,293	1,584
Other Assets | Not designated as hedging instruments: | Forward commitments
Derivative financial instruments
Derivative assets	0	5
Other Liabilities | Designated as hedging instruments: | Interest rate swaps
Derivative financial instruments
Derivative liabilities	5,284	3,847
Other Liabilities | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative liabilities	3,282	2,143
Other Liabilities | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative liabilities	30	0
Other Liabilities | Not designated as hedging instruments: | Forward commitments
Derivative financial instruments
Derivative liabilities	$ 3,866	$ 303