Face (par) amount of debt instrument at time of issuance.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
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- References

No definition available.

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- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
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Debt and Credit Arrangements - Scheduled Annual Maturities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Nov. 06, 2017
Long-term Debt, Fiscal Year Maturity
2024	$ 485,400,000
Debt Instrument
Interest expense, debt	18,100,000	$ 17,700,000	$ 15,900,000
Convertible Notes, due 2024 \| Convertible Debt
Debt Instrument
Principal amount	258,800,000	258,800,000		$ 258,800,000
Interest expense, debt	$ 10,600,000	$ 10,200,000