Stock-Based Compensation (Schedules of Executive Management Share-based Compensation Activity) (Details) - Performance Shares - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Number of shares
Shares potentially payable, beginning balance	138,808	135,941	107,630
Forfeitures (in shares)	(14,689)	(9,035)	0
Payments (in shares)	(77,782)	(112,279)	(35,897)
Shares accrued based on years performance	81,468	124,181	64,208
Shares potentially payable, ending balance	127,805	138,808	135,941
Weighted average grant date value per share
Shares potentially payable, beginning balance (in dollars per share)	$ 84.41	$ 79.11	$ 75.99
Forfeitures (in dollars per share)	87.61	92.02
Payments (in dollars per share)	89.44	86.35	84.27
Shares accrued based on years performance (in dollars per share)	91.80	92.52	86.00
Shares potentially payable, ending balance (in dollars per share)	$ 85.69	$ 84.41	$ 79.11
Year-end intrinsic value
Year-end intrinsic value	$ 10,952	$ 11,717	$ 10,754	$ 8,179