Cash, Cash Equivalents, and Restricted Cash - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Mar. 31, 2020
Restricted Cash And Cash Equivalents Items [Line Items]
Net proceeds from sale leaseback transaction	$ 61.5
Restricted cash	48.8	$ 16.4
Property Plant and Equipment [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash	47.6	15.2
Senior Secured Notes Due in 2022 [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Debt instrument, face amount		650.0
Letter Of Credit [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash	$ 1.2	$ 1.2