Summary of Significant Accounting Policies (Details 2) (Loans, Concentrations of Credit Risk, USD $) In Millions, unless otherwise specified	Dec. 31, 2013 item
Concentrations of Credit Risk
Concentration risk threshold, total risk-based capital threshold (as a percent)	25.00%
Concentration risk threshold, total risk-based capital threshold	$ 188.2
Number of credit concentrations for non-acquired credit impaired loans	5
Lessors of residential and buildings
Concentrations of Credit Risk
Amount loaned	270.8
Lessors of nonresidential buildings
Concentrations of Credit Risk
Amount loaned	317.1
Religious
Concentrations of Credit Risk
Amount loaned	205.8
Borrowers engaged in offices of physicians, dentists and other health practitioners
Concentrations of Credit Risk
Amount loaned	$ 263.8