Stock Based Compensation (Stock Option Activity) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options, Beginning of Year | shares	347,900
Options, Exercised | shares	115,967
Options, Canceled/Forfeited | shares	0
Options, End of Year | shares	231,933
Options, Exercisable at End of Year | shares	231,933
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options, Beginning of Year, Weighted Average Exercise Price | $ / shares	$ 33.49
Options, Exercised, Weighted Average Exercise Price | $ / shares	33.49
Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price | $ / shares	0.00
Options, End of Year, Weighted Average Exercise Price | $ / shares	33.49
Options, Exercisable at End of Year, Weighted Average Exercise Price | $ / shares	$ 33.49
Options, Outstanding at End of Year, Weighted Average Remaining Years Contractual Term	11 months 14 days
Options, Exercisable at End of Year, Weighted Average Remaining Years Contractual Term	11 months 14 days
Options, Outstanding at End of Year, Aggregate Intrinsic Value | $	$ 4,304,676
Options, Exercisable at End of Year, Aggregate Intrinsic Value | $	$ 4,304,676