Derivative Instruments - (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Designated as hedging instruments:
Derivative financial instruments
Derivative liabilities	$ 3,532	$ 3,847
Not designated as hedging instruments:
Derivative financial instruments
Derivative assets	6,736	3,731
Derivative liabilities	2,282	2,446
Other Assets | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative assets	2,002	2,142
Other Assets | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative assets	3,191	1,584
Other Assets | Not designated as hedging instruments: | Forward commitments
Derivative financial instruments
Derivative assets	1,543	5
Other Liabilities | Designated as hedging instruments: | Interest rate swaps
Derivative financial instruments
Derivative liabilities	3,532	3,847
Other Liabilities | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative liabilities	2,002	2,143
Other Liabilities | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative liabilities	150	0
Other Liabilities | Not designated as hedging instruments: | Forward commitments
Derivative financial instruments
Derivative liabilities	$ 130	$ 303