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Long-Term Debt - Senior Secured Credit Facilities (Details) - USD ($)		12 Months Ended
	Apr. 22, 2020	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt issuance costs and discount		$ 16,300,000	$ 10,800,000
Senior secured term loan | Secured Debt
Debt Instrument [Line Items]
Original balance of debt		$ 1,290,000,000
Quarterly installment of original principal		0.25%
Senior secured revolving credit facility | Secured Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Original balance of debt		$ 120,000,000.0
Long-term line of credit		0	$ 0
Outstanding balance on debt		$ 112,500,000
Commitment fee		0.50%
Net leverage ratio		9.50
Commitment threshold		35.00%
Senior secured revolving credit facility | Secured Debt | Letter of Credit
Debt Instrument [Line Items]
Outstanding balance on debt		$ 7,500,000
2018 Incremental Term Loan | Secured Debt
Debt Instrument [Line Items]
Original balance of debt		180,000,000.0
2020 incremental term loans
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 120,000,000.0
Alternate base rate, floor	2.00%
Debt issuance costs and discount	$ 6,500,000
2020 incremental term loans | Secured Debt
Debt Instrument [Line Items]
Original balance of debt		$ 120,000,000.0
LIBOR | 2020 incremental term loans
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	8.00%
Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		3.00%
Federal Funds Effective Swap Rate | Secured Debt
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		0.50%
Federal Funds Effective Swap Rate | 2020 incremental term loans
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
One Month LIBOR | Secured Debt
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.00%
One Month LIBOR | 2020 incremental term loans
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
Base Rate | Senior secured term loan | Secured Debt
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.00%
Base Rate | 2020 incremental term loans
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	7.00%
Minimum | LIBOR | Secured Debt
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		3.00%
Minimum | Base Rate | Secured Debt
Debt Instrument [Line Items]
Debt instrument, margin in addition to base rate		2.00%
Maximum | LIBOR | Secured Debt
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		3.25%
Maximum | Base Rate | Secured Debt
Debt Instrument [Line Items]
Debt instrument, margin in addition to base rate		2.25%

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Debt Instrument, Alternate Base Rate, Floor

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Debt Instrument, Total Commitment Threshold

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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