Stock Based Compensation (Performance Units Information) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Performance Share Risk Free Rate Assumption	0.22%	1.36%	2.47%
Performance Share Volatility Rate Assumption	27.31%	15.00%	16.74%
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for recognizing unrecognized compensation cost	1 year 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, Outstanding at Beginning of Year	475,841
Shares, Granted	373,418
Shares, Vested	(337,332)
Shares, Canceled	(35,573)
Shares, Outstanding at End of Year	476,354	475,841
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Shares, Outstanding at Beginning of Year, Weighted Average Grant Date Fair Value	$ 54.88
Shares, Granted, Weighted Average Grant Date Fair Value	65.57	$ 51.79	$ 62.17
Shares, Vested, Weighted Average Grant Date Fair Value	59.49
Shares, Cancelled, Weighted Average Grant Date Fair Value	58.08
Shares, Outstanding at End of Year, Weighted Average Grant Date Fair Value	$ 59.76	$ 54.88
Shares, Outstanding at End of Year, Weighted Average Remaining Years Contractual Term	1 year 7 months 6 days
Shares, Outstanding at End of Year, Aggregate Intrinsic Value	$ 31,787,102
Performance Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Options vesting period	3 years