Loan Facilities - Narrative (Details) - USD ($)				3 Months Ended			6 Months Ended
	Apr. 30, 2019	Apr. 12, 2019	Oct. 12, 2017	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Apr. 13, 2019
Line of Credit Facility [Line Items]
Proceeds from refinancing of secured term loan, net							$ 0	$ 48,248,000
Secured loan payable				$ 343,274,000			$ 343,274,000		$ 358,003,000
Secured Debt | Recapitalization Credit Agreement
Line of Credit Facility [Line Items]
Long-term debt, weighted average interest rate, over time								6.10%
Secured Debt | New TLB
Line of Credit Facility [Line Items]
Long-term debt, weighted average interest rate, over time							4.20%
Unamortized discount	$ 9,000,000.0
Incremental expense related to the amortization of debt issuance costs				400,000		$ 400,000	$ 900,000	$ 1,000,000.0
Secured Debt | New TLB | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.25%
Secured Debt | Term Loan | Recapitalization Credit Agreement
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity			$ 350,000,000.0
Debt instrument term			5 years
Secured Debt | Term Loan | New TLB
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity		$ 375,000,000.0
Debt instrument term		5 years
Repayments of lines of credit		$ 319,400,000
Proceeds from refinancing of secured term loan, net		48,200,000
Annual principal payments		$ 18,800,000
Annual prepayment of principal, period of time required before year end		90 days
Annual principal payment, percentage of excess cash flow		50.00%
Debt expense		$ 5,700,000
Deferred financing costs		2,700,000								$ 1,800,000
Write off of deferred debt issuance cost	$ 3,000,000.0	$ 4,800,000
Debt instrument, face amount				350,000,000.0			350,000,000.0
Secured loan payable				343,300,000			$ 343,300,000
Borrowings at fair value expressed as a percentage of outstanding principal balance							94.00%
Repayments of long-term debts							$ 15,600,000
Quarterly principal payments					$ 4,700,000
Secured Debt | Term Loan | New TLB | Mandatory Principal
Line of Credit Facility [Line Items]
Repayments of long-term debts				$ 4,700,000
Secured Debt | Term Loan | New TLB | UNITED STATES
Line of Credit Facility [Line Items]
Capital stock of subsidiary, percentage		100.00%
Secured Debt | Term Loan | New TLB | Non-US
Line of Credit Facility [Line Items]
Capital stock of subsidiary, percentage		65.00%
Secured Debt | Term Loan | New TLB | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on variable rate		3.25%
Reduction from the applicable borrowing rates, percentage		0.50%
Secured Debt | Revolving Credit Facility
Line of Credit Facility [Line Items]
Covenant, leverage ratio, excess borrowings, minimum		$ 12,500,000
Secured Debt | Revolving Credit Facility | Recapitalization Credit Agreement
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity			$ 20,000,000.0
Debt instrument term			3 years