Earnings Per Common Share And Share Awards Summary Of Share-Based Award Transactions (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number Of Shares, Options exercised	0	(2,650)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Options exercised		$ 28.63
StockOptionsAndStockAppreciationRightsSARS [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number Of Shares, Outstanding Beginning Balance	19,000	98,150
Number Of Shares, Options/SARs cancelled/forfeited/expired	0	0
Number Of Shares, Outstanding Ending Balance	18,500	19,000	98,150
Number Of Shares, Exercisable as of March 31, 2014	18,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 45.74	$ 30.74
Weighted Average Exercise Price, Options/SARs cancelled/forfeited/expired	$ 0.00	$ 0.00
Weighted Average Exercise Price, Outstanding Ending Balance	$ 45.65	$ 45.74	$ 30.74
Weighted Average Exercise Price, Exercisable as of March 31, 2014	$ 45.65
Average Remaining Contractual Term, Outstanding Beginning Balance	3 years 3 months 7 days	3 years 5 months 5 days	3 years 2 months 1 day
Average Remaining Contractual Term, Outstanding Ending Balance	3 years 3 months 7 days	3 years 5 months 5 days	3 years 2 months 1 day
Average Remaining Contractual Term, Exercisable as of March 31, 2014	3 years 3 months 7 days
Aggregate Intrinsic Value, Outstanding Beginning Balance	$ 669,610	$ 2,871,710
Aggregate Intrinsic Value, Outstanding Ending Balance	559,660	669,610	2,871,710
Aggregate Intrinsic Value, Exercisable as of March 31, 2014	$ 559,660
SARs
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number Of Shares, SARs granted	0	3,000
Number Of Shares, Options exercised	(500)	(79,500)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, SARs granted	$ 0.00	$ 71.59
Weighted Average Exercise Price, Options exercised	$ 49.04	$ 28.77