Long-Term Debt - Acquisition Debt (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2019	Jan. 31, 2020
Long-term debt
Write-off of debt discount and deferred financing fees		$ 707
First Lien Loan
Long-term debt
Aggregate principal amount		$ 929,400
Percentage of quarterly principal payments		0.25%
Write-off of debt discount and deferred financing fees	$ 700
Borrowing interest rate (as a percent)		4.40%
Repayments of Debt	$ 50,000
First Lien Loan | LIBOR
Long-term debt
Margin added to variable rate (as a percent)		2.75%
Variable rate floor (as a percent)		0.00%