Share-Based Compensation Arrangements (Share Options Fair Value Assumptions) (Details) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	57,700	53,700	81,530
Cliff vesting period (years)	3 years	3 years	3 years
Expected term (years)	6 years 6 months	6 years 6 months	6 years 6 months
Expected dividend yield	3.90%	3.80%	3.69%
Weighted average expected volatility	31.67%	31.50%	29.89%
Weighted average risk-free interest rate	4.15%	1.41%	0.46%
Weighted average grant-date fair value	$ 12.01	$ 11.10	$ 5.75