Long-Term Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,000,000	$ 755,000
Less: unamortized debt issuance costs and original issue discount	(9,179)	(3,628)
Long-term debt	990,821	751,372
Less: long-term debt, current	(6,000)	(6,000)
Long-term debt, net	984,821	745,372
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	0	170,000
Senior Unsecured Notes Due 2028 \| Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	600,000	0
Term Loan Facility \| Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 400,000	$ 585,000

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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