Share-based Compensation and Benefit Plans (Schedule of Future Vesting) (Details) - Restricted Stock Units (RSUs) [Member] - Restricted Share Unit Plan For Employees [Member] - shares	Dec. 31, 2018	Dec. 31, 2017	May 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding	179,302	781,307	0
2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding	0
2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding	83,444
2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding	95,858