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Debt - Convertible Senior Notes (Details) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 06, 2021 USD ($) shares | Jun. 01, 2020 USD ($) D $ / shares | Apr. 03, 2021 USD ($) | Oct. 02, 2021 USD ($) | Oct. 03, 2020 USD ($) | Jan. 02, 2021 | Mar. 06, 2017 USD ($)
Debt |  |  |  |  |  |  |
Loss on debt extinguishment |  |  |  | $ (3,370) | $ (3,977) |  |
0.625% Convertible Senior Notes (2025 Notes) |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Principal amount |  | $ 535,000 |  |  |  |  |
Semi-annual interest rate |  | 0.625% |  | 0.625% |  | 0.625% |
Conversion rate, shares per $1,000 principal |  | 8.1498 |  |  |  |  |
Conversion, number of shares of common stock |  | 4,400 |  |  |  |  |
Initial conversion price | $ / shares |  | $ 121.98 |  |  |  |  |
Debt issuance costs |  | $ 10,400 |  |  |  |  |
0.625% Convertible Senior Notes (2025 Notes) | Conversion of Notes, Holders |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Number of trading days within 30 trading day period | D |  | 20 |  |  |  |  |
Number of consecutive trading days | D |  | 30 |  |  |  |  |
Stock price trigger per share | $ / shares |  | $ 159.51 |  |  |  |  |
Stock price trigger, as a percentage of conversion price |  | 130.00% |  |  |  |  |
Number of consecutive business days after the 10 consecutive trading day period | D |  | 5 |  |  |  |  |
Number of consecutive trading days before the five consecutive business days | D |  | 10 |  |  |  |  |
Maximum threshold stock price, as a percentage of conversion price |  | 98.00% |  |  |  |  |
0.625% Convertible Senior Notes (2025 Notes) | Conversion of Notes, Company |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Number of trading days within 30 trading day period | D |  | 20 |  |  |  |  |
Number of consecutive trading days | D |  | 30 |  |  |  |  |
Stock price trigger, as a percentage of conversion price |  | 130.00% |  |  |  |  |
1.375% Convertible Senior Notes (2022 Notes) |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  | $ 400,000
Semi-annual interest rate |  |  |  |  |  |  | 1.375%
1.375% Convertible Senior Notes (2022 Notes) | Conversion of Notes, Holders |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Principal amount of notes for conversion | $ 130,400 |  |  |  |  |  |
Cash paid upon conversion | $ 130,400 |  |  |  |  |  |
Number of shares issued in connection with conversion | shares | 528,022 |  |  |  |  |  |
Debt amount redeemed | $ 10,200 |  |  |  |  |  |
1.375% Convertible Senior Notes (2022 Notes) | Conversion of Notes, Holders | Interest expense |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Loss on debt extinguishment |  |  | $ 3,400 |  |  |  |
1.375% Convertible Senior Notes (2022 Notes) | Conversion of Notes, Company |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Remaining principal amount | $ 140,600 |  |  |  |  |  |

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