Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share
Shares of common stock underlying stock options excluded from the calculation of diluted EPS	264,000	1,774,000	788,000	1,791,000
Basic EPS - Net Income
Net income	$ 1,924	$ 1,813	$ 6,323	$ 2,774
Shares	11,593,000	12,039,000	11,530,000	12,024,000
Per Share Amounts (in dollars per share)	$ 0.17	$ 0.15	$ 0.55	$ 0.23
Effect of dilutive securities - Dilutive effect of stock options
Shares	441,000	138,000	314,000	181,000
Diluted EPS - Adjusted net income
Adjusted net income	$ 1,924	$ 1,813	$ 6,323	$ 2,774
Shares	12,034,000	12,177,000	11,844,000	12,205,000
Per Share Amounts (in dollars per share)	$ 0.16	$ 0.15	$ 0.53	$ 0.23