Stock Compensation Plans (Details) (Stock options, USD $)					3 Months Ended			3 Months Ended			1 Months Ended	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 Stock Incentive Plan	Mar. 31, 2012 Stock Incentive Plan	Aug. 30, 2000 Stock Incentive Plan	Mar. 31, 2013 Directors' Stock Plan	Mar. 31, 2012 Directors' Stock Plan	Aug. 30, 2000 Directors' Stock Plan	Dec. 31, 2012 Employee Stock Plan	Mar. 31, 2013 Employee Stock Plan	Mar. 31, 2012 Employee Stock Plan	Nov. 28, 2012 Employee Stock Plan
Stock Option Plans
Aggregate number of shares which may be issued upon exercise of the options under the plan							1,100,000			550,000				16,000
Exercise period from date of grant					6 months			6 months
Expiration period					10 years			3 years
Further grants made under the plan after the expiration (in shares)					0			0
Stock-Based Compensation Expense					$ 0	$ 0		$ 0	$ 0			$ 0	$ 0
Shares
Outstanding at the beginning of the period (in shares)	129,170	129,170	188,193	188,193
Outstanding at the end of the period (in shares)	129,170	129,170	188,193	188,193
Options exercisable at the end of the period (in shares)	129,170		188,193
Granted (in shares)											15,050
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 14.26	$ 14.26	$ 12.62	$ 12.62
Outstanding at the end of the period (in dollars per share)	$ 14.26	$ 14.26	$ 12.62	$ 12.62
Options exercisable at the end of the period (in dollars per share)	$ 14.26		$ 12.62
Additional Disclosure
Unrecognized compensation expense	0		0
Total intrinsic value of exercisable options	$ 0		$ 0