Share-Based Payments, Deferred Compensation and Employee Ownership Plans - Restricted Shares and Other Share Based Payments Narrative (Details) - Equity Plans - Restricted Stock Units (RSUs) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number		334,230
Non-employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	28,463	90,465
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Other	41,667	48,021
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	246,333	259,536