Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 28, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2002
Summary of Significant Accounting Policies [Abstract]
Contractually past due period for delinquent loans		90 days
Other Real Estate Owned [Abstract]
Other real estate owned		$ 0	$ 736
Key assumptions used in measuring the fair value of mortgage servicing rights [Abstract]
Constant prepayment rate		10.94%	12.12%	9.09%
Discount rate		10.03%	10.06%	10.05%
Weighted average life		6 years 2 months 1 day	6 years 3 months	7 years 18 days
Income Taxes [Abstract]
Equity investment in a partnership					$ 1,000	$ 1,000	$ 1,000	$ 2,355
Period for earning tax credit		10 years
Recapture period of tax credits		15 years
Advertising Costs [Abstract]
Advertising costs		$ 311	$ 344	$ 374
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives used in computing depreciation		15 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives used in computing depreciation		50 years
Furniture and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives used in computing depreciation		3 years
Furniture and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives used in computing depreciation		10 years
Dividend Declared in 2015 Annual [Member]
Stock Dividend [Abstract]
Dividends declared date		Jan. 22, 2015
Stock dividend		4.00%
Stock dividend (in shares)		393,260
Dividends date paid/ to be paid		Mar. 31, 2015
Dividends payable, date of record		Feb. 27, 2015
Dividend Declared in 2016 Annual [Member]
Stock Dividend [Abstract]
Dividends declared date		Jan. 28, 2016
Stock dividend (in shares)		410,636
Dividends date paid/ to be paid		Mar. 31, 2016
Dividends payable, date of record		Feb. 29, 2016
Dividend Declared in 2016 Annual [Member] | Subsequent Event [Member]
Stock Dividend [Abstract]
Stock dividend	4.00%