Share-Based Compensation Arrangements (Compensation Cost for Share-based Compensation Arrangements) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Share-based compensation expense		$ 3,316	$ 3,766	$ 3,124
Related income tax benefits	[1]	978	801	982
Excess Tax Expense (Benefit) from Stock Option Exercises and Issuance of Other Compensation-related Equity Instruments		$ 182	$ (103)	$ 248

[1] Includes $182 thousand and $248 thousand, respectively, of excess tax benefits recognized upon the settlement of share-based compensation awards in 2021 and 2019. Includes $103 thousand of excess tax expenses recognized upon the settlement of share-based compensation awards in 2020.