Long-Term Debt - Schedule of Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt	$ 418,336
Capital lease obligations	24,646
Capital lease obligations		$ 26,501
Total debt	415,680	208,526
Less current portion	(24,398)	(35,376)
Total long-term debt	391,282	173,150
Line of Credit \| HPS Credit Facility
Debt Instrument [Line Items]
Long-term debt	377,267	0
Unamortized financing costs	10,942
Line of Credit \| JPM Credit Facility
Debt Instrument [Line Items]
Long-term debt	0	147,935
Unamortized financing costs		2,513
Promissory Note \| Align Redemption Promissory Note
Debt Instrument [Line Items]
Long-term debt	$ 13,767	$ 34,090

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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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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