Long‑Term Debt - 2026 Notes Capped Call Options Narrative (Details) - Convertible Debt - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended
	Jun. 28, 2021	Jan. 26, 2021	Jun. 30, 2021
2026 Notes
Debt Instrument [Line Items]
Capped call options expense			$ 150
Capped call transaction, cap price (USD per share)		$ 72.9795
Capped call, premium above share price, percentage		65.00%
2027 Notes
Debt Instrument [Line Items]
Capped call options expense			$ 50
Capped call transaction, cap price (USD per share)	$ 95.5575
Capped call, premium above share price, percentage	55.00%