Debt - Convertible Notes (Details) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||
---|---|---|---|---|---|---|---|
Sep. 30, 2019
USD ($)
$ / shares
|
Sep. 30, 2018 |
Sep. 30, 2019
USD ($)
$ / shares
|
Sep. 30, 2018 |
Dec. 31, 2014
USD ($)
$ / shares
|
Dec. 31, 2018
USD ($)
|
May 31, 2018
USD ($)
|
|
Convertible Notes due 2019 | |||||||
Debt Instrument [Line Items] | |||||||
Face amount | $ | $ 172,500,000 | $ 172,500,000 | $ 172,500,000 | $ 172,500,000 | |||
Interest rate (as a percent) | 1.75% | ||||||
Conversion ratio | 0.0159022 | ||||||
Conversion price (in dollars per share) | $ / shares | $ 62.88 | ||||||
Effective interest rate (as a percent) | 6.00% | 6.00% | 6.00% | 6.00% | |||
Convertible notes due 2023 | |||||||
Debt Instrument [Line Items] | |||||||
Face amount | $ | $ 345,000,000 | ||||||
Interest rate (as a percent) | 1.75% | ||||||
Conversion price (in dollars per share) | $ / shares | $ 68.31 | $ 68.31 | |||||
Effective interest rate (as a percent) | 6.00% | 6.00% |
X | ||||||||||
- Definition The price per share of the conversion feature embedded in the debt instrument. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition The average effective interest rate during the reporting period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- 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. No definition available.
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|