Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivative financial instruments
Derivative assets	$ 0	$ 208
Designated as hedging instruments:
Derivative financial instruments
Derivative instruments	2,838	1,428
Designated as hedging instruments: | Interest rate swaps
Derivative financial instruments
Derivative assets	0	208
Not designated as hedging instruments:
Derivative financial instruments
Derivative assets	3,172	2,611
Derivative instruments	1,909	1,888
Other Assets | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative assets	1,285	1,812
Other Assets | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative assets	1,887	464
Other Assets | Not designated as hedging instruments: | Forward contracts
Derivative financial instruments
Derivative assets	0	335
Other Liabilities | Designated as hedging instruments: | Interest rate swaps
Derivative financial instruments
Derivative instruments	2,838	1,428
Other Liabilities | Not designated as hedging instruments: | Interest rate contracts
Derivative financial instruments
Derivative instruments	1,285	1,812
Other Liabilities | Not designated as hedging instruments: | Interest rate lock commitments
Derivative financial instruments
Derivative instruments	0	52
Other Liabilities | Not designated as hedging instruments: | Forward contracts
Derivative financial instruments
Derivative instruments	$ 624	$ 24