Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013
Commitments to Extend Credit
Commitments and Contingencies
Commitments outstanding	$ 307.2
Standby Letters of Credit
Commitments and Contingencies
Commitments outstanding	4.7
Commitments to Originate Mortgage Loans Held-for-Sale at Fixed Prices
Commitments and Contingencies
Commitments outstanding	25.5
Forward Sales Commitments
Commitments and Contingencies
Commitments outstanding	$ 38.0