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Fair Value - Schedule of Carrying Amounts and Estimated Fair Values (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 01, 2016
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total long-term debt, net - Carrying Amount	$ 839,350	$ 334,679
2021 Convertible Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total long-term debt, net - Carrying Amount	873,800	344,000
2018 Amended Term B Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total long-term debt, net - Carrying Amount			$ 600,000
Recurring
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total long-term debt, net - Carrying Amount	839,350	334,679
Total long-term debt, net - Estimated Fair Value	842,627	335,642
Recurring | 2020 Term B Loan Facility
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total long-term debt, net - Carrying Amount	839,302	0
Total long-term debt, net - Estimated Fair Value	842,579	0
Recurring | 2021 Convertible Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total long-term debt, net - Carrying Amount	48	0
Total long-term debt, net - Estimated Fair Value	48	0
Recurring | 2018 Amended Term B Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total long-term debt, net - Carrying Amount	0	334,679
Total long-term debt, net - Estimated Fair Value	$ 0	$ 335,642

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+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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