Earnings Per Share Level 4 (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 4,110	$ 4,072	$ 11,575	$ 9,024
Total average basic common shares outstanding	19,531,694	20,404,441	19,705,105	20,355,057
Effect of dilutive stock options and restricted stock awards	931,544	809,924	914,979	1,020,127
Total average diluted common shares outstanding	20,463,238	21,214,365	20,620,084	21,375,184
Basic	$ 0.21	$ 0.20	$ 0.59	$ 0.44
Diluted	$ 0.20	$ 0.19	$ 0.56	$ 0.42
Weighted average anti-dilutive common shares	567,995	512,298	431,446	283,762