General - Long-Term Debt, Finance Lease and Deferred Financing Obligations - Credit Agreement - Contractual Maturities (Details) - Unsecured Debt - 2017 Credit Agreement, senior unsecured term loan facility $ in Millions	Mar. 31, 2020 USD ($)
Long-term Debt, Fiscal Year Maturity
2020	$ 4.4
2021	0.6
2022	17.5
2023	$ 258.1