Stock-Based Compensation Stock-Based Compensation - Performance Vesting Stock Options (Details) shares in Thousands	Mar. 31, 2020 shares
2020/2021 | Awards Vesting in 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of exercisable options (in shares)	0
2020/2021 | Awards Vesting in 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of exercisable options (in shares)	49
2019/2020 | Awards Vesting in 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of exercisable options (in shares)	99
2019/2020 | Awards Vesting in 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of exercisable options (in shares)	98
2018/2019 | Awards Vesting in 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of exercisable options (in shares)	0