Stock Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of options activity
Options, Beginning Balance	569,587	699,234
Weighted Average Exercise Price, Beginning Balance	$ 12.87	$ 12.14
Weighted Average Remaining Contractual Term, Beginning Balance	3 years 8 months 23 days	4 years 7 months 28 days	5 years 2 months 9 days
Aggregate Intrinsic Value, Beginning Balance	$ 5,058	$ 6,464
Options, Granted
Options, Exercised	25,644	110,135
Options, Forfeited	6,000	19,512
Weighted Average Exercise Price, Exercised		$ 8.14
Weighted Average Exercise Price, Forfeited	$ 18.41	$ 12.80
Options, Ending Balance	537,943	569,587	699,234
Weighted Average Exercise Price, Ending Balance	$ 12.99	$ 12.87	$ 12.14
Weighted Average Remaining Contractual Term, Ending Balance	3 years 8 months 23 days	4 years 7 months 28 days	5 years 2 months 9 days
Aggregate Intrinsic Value, Ending Balance	2,894	5,058	6,464
Options, Exercisable	480,030	453,010
Weighted Average Exercise Price, Exercisable	$ 12.60	$ 12.50
Weighted Average Remaining Contractual Term, Exercisable	3 years 4 months 24 days	3 years 11 months 5 days
Aggregate Intrinsic Value, Exercisable	$ 2,802	$ 4,189