Earnings Per Common Share And Share Awards Summary Of Share-Based Award Transactions (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number Of Shares, Options exercised	(1,500)	(1,000)
Share Based Compensation Arrangement By Share Based Payment Award, Options, Unvested, Number	3,375
Share Based Compensation Arrangement By Share Based Payment Award, Options, Unvested, Weighted Average Exercise Price	$ 73.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Options exercised	$ 36.79	$ 27.21
StockOptionsAndStockAppreciationRightsSARS [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number Of Shares, Outstanding Beginning Balance	21,000	19,000
Number Of Shares, Options/SARs cancelled/forfeited/expired	0	0
Number Of Shares, Outstanding Ending Balance	22,000	21,000	19,000
Number Of Shares, Exercisable as of June 30, 2015	18,625
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 51.30	$ 45.74
Weighted Average Exercise Price, Options/SARs cancelled/forfeited/expired	0.00	0.00
Weighted Average Exercise Price, Outstanding Ending Balance	57.04	$ 51.30	$ 45.74
Weighted Average Exercise Price, Exercisable as of June 30, 2015	$ 54.15
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	4 years 5 months 4 days	3 years 7 months 20 days	3 years 5 months 4 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	4 years 5 months 4 days	3 years 7 months 20 days	3 years 5 months 4 days
Average Remaining Contractual Term, Exercisable as of June 30, 2015	3 years 11 months 26 days
Share Based Compensation Arrangement By Share Based Payment Award, Options, Unvested, Weighted Average Remaining Contractual Term	6 years 10 months 20 days
Aggregate Intrinsic Value, Outstanding Beginning Balance	$ 453,510	$ 669,610
Aggregate Intrinsic Value, Outstanding Ending Balance	316,230	$ 453,510	$ 669,610
Aggregate Intrinsic Value, Exercisable as of June 30, 2015	316,230
Share Based Compensation Arrangement By Share Based Payment Award, Options, Unvested, Intrinsic Value	$ 0
SARs
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number Of Shares, SARs granted	4,500	4,500
Number Of Shares, Options exercised	(2,000)	(1,500)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, SARs granted	$ 73.00	$ 68.70
Weighted Average Exercise Price, Options exercised	$ 47.88	$ 49.04