Long-Term Debt - Finance Leases (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Dec. 31, 2019	Mar. 31, 2020	Sep. 30, 2020
Debt Disclosure [Abstract]
Imputed interest rate (percent)	3.30%
Weighted Average Estimated Life (in Years)		5 years
Finance lease liabilities			$ 4.8
Noncash investing and financing activity, unpaid portion, finance lease arrangements			$ 4.8