Stock-Based Compensation Plans Compensation Expense and Related Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 8,402	$ 7,529	$ 7,413
Stock Options And Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	9,264	8,381	7,413
Tax benefit	(2,027)	(1,790)	(1,610)
Total stock-based compensation, net of tax	$ 7,237	$ 6,591	$ 5,803

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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