Debt - Convertible Notes (Details)
|
1 Months Ended |
12 Months Ended |
|
May 31, 2014
USD ($)
|
Dec. 31, 2020
USD ($)
$ / shares
|
Dec. 31, 2019
USD ($)
|
| Debt Instrument [Line Items] |
|
|
|
| Extinguishment of Debt, Amount |
|
|
$ 2,000,000.0
|
| Stated interest rate |
|
3.64%
|
|
| Unamortized deferred financing costs |
|
$ 18,515,000
|
17,549,000
|
| Convertible Senior Notes |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Unamortized discount |
|
$ 1,000,000.0
|
6,500,000
|
| Stated interest rate |
|
3.75%
|
|
| Equity component of the conversion feature |
|
$ 55,100,000
|
55,100,000
|
| Unamortized deferred financing costs |
|
300,000
|
2,100,000
|
| Convertible Senior Notes | Convertible Senior Notes Due 2019 |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Extinguishment of Debt, Amount |
|
|
$ 402,500,000
|
| Aggregate principal amount of debt |
$ 402,500,000
|
|
|
| Stated interest rate |
2.875%
|
|
|
| Debt instrument, maturity date |
May 15, 2019
|
|
|
| Convertible Senior Notes | Convertible Senior Notes Due 2021 |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Extinguishment of Debt, Amount |
|
$ 154,600,000
|
|
| Aggregate principal amount of debt |
$ 345,000,000.0
|
|
|
| Stated interest rate |
3.75%
|
|
|
| Debt conversion ratio |
|
17.4458
|
|
| Anti-dilutive cash dividends, exceeding (in USD per share) | $ / shares |
|
$ 0.73026
|
|