Share-Based Compensation Arrangements (Share Options Activity) (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Share Options:
Beginning of period	326,245
Granted	53,700	81,530	61,800
Exercised	(47,365)
Forfeited or expired	(10,440)
End of period	322,140	326,245
Options exercisable	138,690
Options expected to vest in future periods	183,450
Weighted Average Exercise Price (in dollars per share):
Beginning of period	$ 42.44
Granted	54.59
Exercised	31.87
Forfeited or expired	44.82
End of period	45.95	$ 42.44
Options exercisable	48.81
Options expected to vest in future periods	$ 43.78
Outstanding Weighted Average Remaining Contractual Term	7 years 2 months 1 day
Exercisable Weighted Average Remaining Contractual Term	5 years 10 days
Expected to Vest Weighted Average Remaining Contractual Term	8 years 9 months 10 days
Outstanding Aggregate Intrinsic Value	$ 3,422
Exercisable Aggregate Intrinsic Value	1,112
Expected to Vest Aggregate Intrinsic Value	$ 2,310