Amount of amortization expense attributable to debt issuance costs.

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

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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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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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Lowest interest rate, or floor, that may be charged.

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Represents the maximum debt issuance costs for new lenders exceeded 10% test.

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The percent of reduction in interest rate in repricing term loans applicable to the existing senior secured term loans.

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Long-Term Debt and Credit Facilities - Term Loan Repricing (Details) - USD ($) $ in Thousands	Apr. 16, 2019	Jul. 13, 2018	Mar. 31, 2020	Dec. 31, 2019
Debt instruments
Outstanding amount of term loans			$ 1,557,310	$ 1,434,875
Proceeds from refinancing term loans	$ 30,000	$ 30,000
First Amendment
Debt instruments
Proceeds from refinancing term loans		$ 343,400
Reduction in interest rate (in percentage)		100.00%
First Amendment \| Federal funds rate
Debt instruments
Variable interest rate (as a percent)		0.50%
First Amendment \| LIBOR
Debt instruments
Floor interest rate		1.00%
Variable interest rate (as a percent)		6.50%
First Amendment \| One-month adjusted LIBOR
Debt instruments
Variable interest rate (as a percent)		1.00%
First Amendment \| Base rate
Debt instruments
Variable interest rate (as a percent)		5.50%
Senior secured revolving facility
Debt instruments
Outstanding amount of term loans		$ 343,400
Maximum debt issuance costs for new lenders exceeded 10% test		100
Senior secured revolving facility \| First Amendment
Debt instruments
Debt issuance costs		1,000
Amortization expense of debt issuance costs		1,000
Write off of previously recognized debt issuance costs		$ 100