Stock-Based Compensation (Summary of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Stock-Based Compensation [Abstract]
Options, Outstanding, beginning of year	219,540
Options, Outstanding, end of year	219,540	219,540
Options, Exercisable, end of year	192,040
Weighted Average Exercise Price Per Share, Outstanding, beginning of year	$ 26.64
Weighted Average Exercise Price Per Share, Outstanding, end of year	$ 26.64	$ 26.64
Weighted Average Exercise Price Per Share, Exercisable, end of year	$ 26.58
Weighted Average Remaining Contractual Term, Outstanding,	5 years 9 months 18 days	6 years 1 month 6 days
Weighted Average Remaining Contractual Term, Outstanding,	5 years 9 months 18 days	6 years 1 month 6 days
Weighted Average Remaining Contractual Term, Exercisable at End of Period	5 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding,	$ 147
Aggregate Intrinsic Value, Outstanding, end of year	431	147
Aggregate Intrinsic Value, Exercisable, end of year	388
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 117
Share Price	$ 28.60	$ 26.90	$ 27.82