Debt - Narrative (Details) - USD ($)			3 Months Ended		12 Months Ended
	Jan. 23, 2018	Dec. 01, 2016	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 18, 2019	Dec. 18, 2018
Line of Credit Facility [Line Items]
Borrowings			$ 344,000,000
Voluntary prepayment against the term loan	$ 100,000,000.0		0	$ 50,000,000	$ 150,000,000.0
Interest expense			4,251,000	6,685,000
Term B Loan Facility
Line of Credit Facility [Line Items]
Borrowing capacity	$ 494,000,000.0	$ 600,000,000.0				$ 1,100,000,000	$ 1,100,000,000
Debt instrument, maturity date		Nov. 30, 2023
Borrowings		$ 600,000,000.0	$ 344,000,000.0
Debt instrument, prepayment premium	1.00%
Interest rate			4.90%
Unamortized debt issuance costs			$ 8,700,000		$ 9,300,000
Interest expense			4,300,000	6,700,000
Amortization of debt issuance costs			$ 600,000	$ 600,000
Term B Loan Facility | Eurodollar
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.50%
Term B Loan Facility | Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	1.50%
Term B Loan Facility | Royal Bank of Canada
Line of Credit Facility [Line Items]
Borrowing capacity		$ 600,000,000.0
Loan facility, term		7 years