Commitments and Contingencies - Additional Information (Details) £ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) $ / £	Mar. 31, 2020 GBP (£) $ / £
Commitments And Contingencies [Line Items]
Purchase Commitments	$ 38.7
Long-term purchase commitment, Amount	$ 52.5
Pension Plan, Defined Benefit
Commitments And Contingencies [Line Items]
Defined benefit plan, estimated future employer contributions in current fiscal year, description	We have a contributory defined benefit plan that covers certain employees in the United Kingdom.  As of March 31, 2020, the unfunded liability for this defined benefit plan was approximately $14.0 million.  We are obligated to make annual contributions, each year through December 2029, of approximately GBP 2 million (approximately $2.4  million based on a GBP: USD exchange rate of 1.2:1).  The current annual contributions were set with regard to the funding position as of April 2016, and must be reviewed by the Trustees at least every three years. A review as of April 2019 is underway and the outcome of the review could result in a change in the amount of the payment or the period over which payment is required.
Defined benefit plan, expected future benefit payments in year one	$ 2.4	£ 2
Defined benefit plan, expected future benefit payments in year two	2.4	2
Defined benefit plan, expected future benefit payments in year three	2.4	2
Defined benefit plan, expected future benefit payments in year four	2.4	2
Defined benefit plan, expected future benefit payments in year five	2.4	2
Defined benefit plan, expected future benefit payments in eight fiscal years thereafter	$ 2.4	£ 2
GBP:USD exchange rate | $ / £	1.2	1.2
Unfunded liability of defined benefit plan	$ 14.0