Stock Based Compensation (Stock Options Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Stock Based Compensation [Abstract]
Number of Shares, Outstanding at beginning of period	248,515
Number of Shares, Granted	19,885
Number of Shares, Forfeited	(1,498)
Number of Shares, Exercised	(63,777)
Number of Shares, Outstanding at end of period	203,125
Weighted Average Exercise Price, Outstanding at beginning of period	$ 18.86
Weighted Average Exercise Price, Granted	$ 20.35
Weighted Average Exercise Price, Forfeited	$ 22.30
Weighted Average Exercise Price, Exercised	$ 13.17
Weighted Average Exercise Price, Outstanding at end of period	$ 20.76
Weighted Average Remaining Contractual Life, in Years, Outstanding at end of period	5 years 15 days