Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic net income per share:
Net income applicable to common shares	$ 793	$ 1,545	$ 1,102	$ 2,250
Weighted average common shares outstanding	11,137	11,978	11,258	12,252
Basic net income per share of common stock	$ 0.07	$ 0.13	$ 0.10	$ 0.18
Diluted net income per share:
Net income applicable to common shares	$ 793	$ 1,545	$ 1,102	$ 2,250
Weighted average common shares outstanding	11,137	11,978	11,258	12,252
Weighted average common shares, assuming dilutive effect of stock options	11,677	11,982	11,680	12,260
Diluted net income per share of common stock	$ 0.07	$ 0.13	$ 0.10	$ 0.18
Stock Option [Member]
Diluted net income per share:
Dilutive effects of stock options	540	4	422	8