Benefit Plans (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Information related to the stock options granted under the 1999 Plan and the 2007 Plan
Intrinsic value of options exercised	$ 31,000
Cash received from option exercises	2,000
Tax benefit realized from option exercises
Weighted average fair value of options granted	$ 1.38	$ 0.87	$ 1.33