Stock-based Compensation (Details) (USD $)	3 Months Ended				3 Months Ended							3 Months Ended		3 Months Ended		3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Subsequent Event [Member]	Apr. 30, 2013 Subsequent Event [Member]	Mar. 31, 2013 Employee Stock Ownership Plan [Member]	Mar. 31, 2012 Employee Stock Ownership Plan [Member]	Mar. 31, 2013 Employee Stock Ownership Plan [Member] ESOP borrowing 2008 [Member]	Jan. 31, 2008 Employee Stock Ownership Plan [Member] ESOP borrowing 2008 [Member]	Mar. 31, 2013 Employee Stock Ownership Plan [Member] ESOP borrowing 2012 [Member]	Aug. 31, 2012 Employee Stock Ownership Plan [Member] ESOP borrowing 2012 [Member]	Dec. 31, 2008 Stock Options and Stock Appreciation Rights [Member]	Mar. 31, 2013 Restricted Stock and Restricted Stock Units [Member]	Mar. 31, 2013 Restricted Stock and Restricted Stock Units [Member] Employee Stock Ownership Plan [Member]	Mar. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Mar. 31, 2013 Non-Vested Restricted Stock Awards [Member]	Mar. 31, 2012 Non-Vested Restricted Stock Awards [Member]	Dec. 31, 2008 Non-Vested Restricted Stock Awards [Member]
Stock-based Compensation [Line Items]
Shares authorized (in shares)											126,287							50,514
Share-based compensation expense	$ 43,000	$ 33,000
Annual vesting (in hundredths)														20.00%		20.00%
Award vesting period																5 years
Vesting term from grant date														1 year		1 year
Term of awards	10 years
Options, Outstanding [Roll Forward]
Outstanding at the beginning of the period (in shares)														123,906
Granted (in shares)												48,134		0
Exercised (in shares)														0
Forfeited (in shares)														0
Expired (in shares)														0
Outstanding at end of the period (in shares)														123,906
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at the beginning of the period (in dollars per share)														$ 8.94
Granted (in dollars per share)														$ 0
Exercised (in dollars per share)														$ 0
Forfeited (in dollars per share)														$ 0
Expired (in dollars per share)														$ 0
Outstanding at end of the period (in dollars per share)														$ 8.94
Options, Additional Disclosures [Abstract]
Exercisable (in shares)														84,869
Exercisable, Weighted-Average Exercise Price (in dollars per share)														$ 9.03
Outstanding, Weighted-Average Remaining Contractual Term														6 years 3 months 29 days
Expected to vest, assuming a 0% forfeiture rate over the vesting term (in shares)														123,906
Expected to vest, assuming a 0% forfeiture rate over the vesting term (in dollars per share)														$ 8.94
Outstanding, Aggregate Intrinsic Value														460,930	180,903
Exercisable, Weighted Average Remaining Contractual Term														5 years 6 months 14 days
Exercisable Aggregate Intrinsic Value														308,074
Expected to vest, Weighted Average Remaining Contractual Term														6 years 1 month 2 days
Expected to vest, assuming a 0% forfeiture rate over the vesting term Aggregate Intrinsic Value														460,930
Unrecognized compensation cost														111,000		82,000
Weighted-average vesting period														5 years 6 months		2 years
Restricted stock award vesting rights	Over a five-year period beginning at the grant date with 20% vesting on the anniversary date of each grant date.
Nonvested Restricted Stock Awards [Roll Forward]
Non-vested at the beginning of the period (in shares)																24,747
Granted (in shares)																0
Vested (in shares)																0
Forfeited (in shares)																0
Expired (in shares)																0
Non-vested at the end of the period (in shares)																24,747
Nonvested Restricted Stock Awards, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested at beginning of the period (in dollars per share)																$ 8.44
Non-vested at the end of the period (in dollars per share)																$ 8.44
Nonvested Restricted Stock Awards, Additional Disclosures [Abstract]
Expected to vest assuming a 0% forfeiture rate over the vesting term (in shares)																24,747
Expected to vest assuming a 0% forfeiture rate over the vesting term, Weighted Average Grant Date Fair Value (in dollars per share)																$ 8.44
Aggregate Intrinsic Value (in dollars per share)																$ 12.66
Expected to vest, Aggregate Intrinsic Value (in dollars per share)																$ 12.66
Aggregate intrinsic value																	313,000
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Amount borrowed by ESOP to purchase common stock								1,200,000		1,100,000
Repayment terms					10 years
ESOP loan interest rate loan to purchase company stock (in hundredths)								4.00%		2.25%
ESOP remaining loan balance from shares purchased							638,000		1,000,000
Committed to release (in shares)					21,443
Unallocated shares (in shares)					152,572
Number of shares hold by the trust													202,755
Fair value of shares held by ESOP trust					2,600,000
ESOP compensation expense					$ 76,000	$ 25,000
Dividends payable, declaration date			Apr. 30, 2013
Cash dividend (in dollars per share)				$ 0.05
Dividends payable, payment date			May 28, 2013
Dividends payable, record date			May 13, 2013