Shareholders' Equity (Details) (USD $)	0 Months Ended			3 Months Ended	12 Months Ended
	Mar. 02, 2011	Jan. 12, 2011	Jan. 16, 2009	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Preferred Stock [Abstract]
Preferred stock issued			$ 26,400,000				$ 25,334,000
Preferred stock, shares issued (in shares)			26,380
Preferred stock, par value (in dollars per share)			$ 0
Preferred stock, liquidation preference per share (in dollars per share)			$ 1,000
Preferred stock, liquidation preference			26,400,000
Number of common shares available for TARP warrant issued (in shares)			492,164
Common stock, par value (in dollars per share)			$ 0		$ 0	$ 0
Investment Warrants, exercise price (in dollars per share)			$ 8.04
Maximum period for warrant exercisable after issue			10 years
Maximum dividends allowed under agreement (in dollars per share)			$ 0.065
Preferred stock, dividend rate, percentage (in hundredths)			5.00%
Increased dividend percentage after five years (in hundredths)			9.00%
Period for increase of cumulative dividend percentage after payment			5 years
Number of preferred stock dividend not paid in full					6
Number of directors to elect					2
Number of preferred stock dividend paid in consecutive dividend periods					4
Period for discount being amortized by using effective interest rate					5 years
Effective interest rate on unstated dividend cost (in hundredths)					6.52%
Preferred stock redeemed (in shares)		26,380
Preferred stock redeemed		26,600,000
Principal value of preferred stock redeemed		26,400,000
Payment of accrued dividends		209,000
Unaccreted discount							1,000,000
Accretion of the remaining discount reducing net income available to common shareholders				1,000,000
Summary of assumptions used to determine fair value of warrants [Abstract]
Dividend yield (in hundredths)					5.00%
Expected life (years)					10 years
Expected volatility (in hundredths)					49.56%
Risk-free rate (in hundredths)					2.80%
Fair value per warrant at grant date (in dollars per share)					$ 3.27
Relative fair value per warrant at grant date (in dollars per share)					$ 3.49
Repurchase of TARP warrants	$ 1,600,000