Advances from Federal Home Loan Bank (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Percentage Of Borrowings Limited To Assets	50.00%
Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value, Total	$ 644.1	$ 676.6
Proceeds From First Federal Home Loan Bank Advances	425.8
Securities Investment [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Percentage Of Advances Secured Collateral Pledged	105.00%
Residential Mortgage [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Percentage Of Advances Secured Collateral Pledged	125.00%
Multi Family or Non Residential Real Estate Loans, and Agriculture Real Estate Loans [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Percentage Of Advances Secured Collateral Pledged	300.00%
One to Four Family Residential Mortgages or Investment Securities [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Percentage Of Secured Borrowings	50.00%
Cash Management Advance [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of Credit, Current	15.0
Repo Advance [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of Credit, Current		$ 100.0