Employee Benefits (Details) (USD $)	12 Months Ended									12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Employee Stock Ownership Plan [Member]	Dec. 31, 2011 Employee Stock Ownership Plan [Member]	Dec. 31, 2012 Employee Stock Ownership Plan [Member] ESOP borrowing 2008 [Member]	Dec. 31, 2008 Employee Stock Ownership Plan [Member] ESOP borrowing 2008 [Member]	Dec. 31, 2012 Employee Stock Ownership Plan [Member] ESOP borrowing 2012 [Member]	Aug. 31, 2012 Employee Stock Ownership Plan [Member] ESOP borrowing 2012 [Member]	Dec. 31, 2012 Stock Options and Stock Appreciation Rights [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2012 Non-Vested Restricted Stock Awards [Member]	Dec. 31, 2012 SERP [Member]	Dec. 31, 2011 SERP [Member]
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Employer contribution amount	$ 19,000	$ 68,000
Deferred Compensation [Abstract]
Age of employee when benefit becomes payable	65.
Deferred compensation liability	108,000	141,000
Employer discretionary contribution	0	20,000
Defined Benefit Plan Disclosure [Line Items]
Accrued defined pension plan liability													571,000	403,000
Compensation expense (reduction) related to the SERP													168,000	149,000
Stock-based Compensation [Line Items]
Shares authorized (in shares)									126,287			50,514
Share-based compensation	163,000	132,000
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 year (in shares)										97,492
Granted (in shares)										26,414
Exercised (in shares)										0
Forfeited (in shares)										0
Expired (in shares)										0
Outstanding at the end of the year (in shares)										123,906	97,492
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at the beginning of the year (in dollars per share)										$ 9.07
Granted (in dollars per share)										$ 8.94
Exercised (in dollars per share)										$ 0
Forfeited (in dollars per share)										$ 0
Expired (in dollars per share)										$ 0
Outstanding at the end of the period (in dollars per share)										$ 8.94	$ 9.07
Options, Additional Disclosures [Abstract]
Exercisable (in shares)										61,682
Exercisable, Weighted-Average Exercise Price (in dollars per share)										$ 9.07
Outstanding, Weighted-Average Remaining Contractual Term										6 years 3 months 29 days	6 years 6 months 25 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										180,903,000	0
Grants in period, weighted average remaining contractual term										6 years 3 months 28 days
Exercisable, Weighted Average Remaining Contractual Term										5 years 6 months 22 days
Exercisable Aggregate Intrinsic Value										82,037,000
Expected to vest, Weighted-Average Remaining Contractual Term										6 years 3 months 29 days
Expected to vest, assuming a 0% forfeiture rate over the vesting term Aggregate Intrinsic Value										180,903,000
Unrecognized compensation cost										134,000		101,000
Weighted-average vesting period										2 years 1 month 6 days		2 years 1 month 6 days
Share-based compensation arrangement, fair value assumptions and methodology [Abstract]
Annual dividend yield (in hundredths)	0.00%
Expected volatility (in hundredths)	28.97%
Risk-free interest rate (in hundredths)	1.46%
Expected term (in years)	7 years 6 months
Weighted-average grant date fair value per option granted (in dollars per share)	$ 2.94
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.
Non-vested Restricted Stock Awards [Roll Forward]
Non-vested at the beginning of the period (in shares)												22,706
Granted (in shares)												9,607
Vested (in shares)												(7,566)
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)												$ 8.41
Granted (in dollars per share)												$ 8.48
Vested (in dollars per share)												$ 8.41
Expired (in dollars per share)												$ 0
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)												$ 10.40
Expected to vest, Aggregate Intrinsic Value (in dollars per share)												$ 10.40
Aggregate intrinsic value												257,000
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		21,443
Unallocated shares (in shares)	152,572		152,572
Fair value of shares held by ESOP trust			2,100,000
ESOP compensation expense			$ 216,000	$ 85,000