Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Convertible Senior Notes (Details)				3 Months Ended	9 Months Ended
Convertible Senior Notes (Details)	Oct. 05, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 28, 2020 USD ($) day $ / shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Debt Instrument [Line Items]
Net proceeds realized					$ 194,000,000	$ 0
Debt borrowing rate \| Discounted cash flow
Debt Instrument [Line Items]
Non-convertible debt borrowing rate (percent)			9.70%
The Notes \| Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 200,000,000.0
Net proceeds realized		$ 194,000,000.0
Conversion ratio			0.0411794
Conversion price (in usd per share) \| $ / shares			$ 24.28
Multiples of principle amount available as optional conversion to holders			$ 1,000
Issuance costs incurred			6,600,000
Liability component allocation of issuance			132,300,000
Equity component allocation of issuance			$ 65,500,000
Amortization period of unamortized issuance costs			7 years
Effective interest rate (percent)			9.90%
The Notes \| Convertible Notes \| Conversion circumstance, one
Debt Instrument [Line Items]
Conversion price threshold (percent)			130.00%
Conversion threshold in days \| day			20
Conversion threshold in consecutive days \| day			30
The Notes \| Convertible Notes \| Conversion circumstance, two
Debt Instrument [Line Items]
Conversion price threshold (percent)			98.00%
Conversion threshold in days \| day			5
Conversion threshold in consecutive days \| day			10
The Notes \| Convertible Notes \| Conversion circumstance, three
Debt Instrument [Line Items]
Conversion price threshold (percent)			130.00%
Conversion threshold in days \| day			20
Conversion threshold in consecutive days \| day			30
Redemption price percentage of principal (percent)			100.00%
The Notes \| Convertible Notes \| Subsequent event
Debt Instrument [Line Items]
Net proceeds realized	$ 222,500,000
Initial Notes \| Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 200,000,000.0
Stated interest rate (percent)			2.75%
Interest expense				$ 0		0
Borrowings		$ 127,960,000		$ 0	$ 127,960,000	$ 0
Option Notes \| Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 30,000,000.0