Debt - Narrative (Details) $ / shares in Units, shares in Millions				1 Months Ended				3 Months Ended	12 Months Ended
	Aug. 01, 2019 USD ($)	May 30, 2019 USD ($)	Jun. 01, 2018 USD ($)	Oct. 31, 2020	Mar. 28, 2020 USD ($) d	Mar. 30, 2019 USD ($)	Sep. 29, 2018 USD ($) d	Dec. 28, 2019 USD ($) d	Dec. 26, 2020 USD ($) $ / shares	Dec. 28, 2019 USD ($)	Dec. 29, 2018 USD ($)	Dec. 24, 2020 $ / shares	Sep. 26, 2020 installment	Dec. 23, 2019 USD ($)	Sep. 28, 2019 USD ($) $ / shares shares
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred tax liability								$ 8,700,000	$ 4,164,000	$ 8,700,000
Closing price of common stock (in usd per share) | $ / shares												$ 10.97
If converted, value in excess of principal									86,500,000
Long-term line of credit									77,000,000.0
Net carrying amount								323,678,000	445,996,000	323,678,000
Payment of capped call									0	0	$ 48,880,000
Credit Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt issuance costs, net								4,900,000		4,900,000
Amortization of debt issuance costs									1,100,000
Contractual interest expense									3,900,000
Line of credit remaining borrowing capacity								115,900,000	61,300,000	115,900,000
Letters of credit outstanding								4,100,000	$ 11,500,000	4,100,000
Credit Facility | Minimum | Revolving Credit Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commitment fee percentage	0.375%
Credit Facility | Minimum | LIBOR
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate	2.00%
Credit Facility | Minimum | Base Rate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate	1.00%
Credit Facility | Maximum | Revolving Credit Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commitment fee percentage	0.625%
Credit Facility | Maximum | LIBOR
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate	2.50%
Credit Facility | Maximum | Base Rate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate	1.50%
2.125% Convertible Senior Notes Due September 1, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument interest percentage									2.125%
Proceeds from issuance of 2024 Notes							$ 391,400,000
Conversion price (in dollars per share) | $ / shares															$ 9.87
Purchase price as a percentage on principal amount of the notes upon the occurrence of a fundamental change							100.00%
Deferred tax liability									$ 30,900,000
Fair value of convertible debt									515,200,000
Principal amount								402,500,000	402,500,000	402,500,000					$ 1,000
Amortization of debt issuance costs									1,269,000	1,149,000
Contractual interest expense									8,553,000	8,553,000
Net carrying amount								$ 285,690,000	306,398,000	285,690,000
Payment of capped call							$ 48,900,000
Strike price (in dollars per share) | $ / shares															$ 9.87
Cap price (in dollars per share) | $ / shares															$ 15.19
Number of shares covered by capped transactions (in shares) | shares															40.8
Conversion ratio							0.1012812
Net equity component carrying amount									$ 128,700,000
2.125% Convertible Senior Notes, Circumstance 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold trading days | d								20
Threshold consecutive trading days | d								30
Convertible threshold minimum percentage								130.00%
2.125% Convertible Senior Notes, Circumstance 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold trading days | d							5
Threshold consecutive trading days | d							5
Convertible, threshold maximum percentage							98.00%
Principal amount															$ 1,000
1.75% Convertible Senior Notes Due June 1, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument interest percentage									1.75%
Additional effective rate of interest to be used on amortized carrying value									10.23%
Principal amount									$ 150,000,000.0
Amortization of debt issuance costs											402,000
Contractual interest expense											$ 1,094,000
Repayment of debt			$ 150,000,000.0
Repayment of final coupon interest			$ 1,300,000
Convertible Senior Notes, 2.5%, Due March 1, 2027
Accounts, Notes, Loans and Financing Receivable [Line Items]
Conversion ratio									0.1305995
Line of Credit | Credit Facility | Revolving Credit Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum borrowing capacity	$ 100,000,000													$ 150,000,000
Additional borrowing capacity	50,000,000
Line of Credit | Credit Facility | Letter of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum borrowing capacity	50,000,000
Line of Credit | Credit Facility | Swing Loan Sub-Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum borrowing capacity	$ 10,000,000
Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument interest percentage													5.25%
Debt issuance costs, net								$ 8,400,000	$ 8,200,000	8,400,000
Debt term						5 years
Proceeds from debt						$ 8,700,000
Debt payment installments | installment													59
Debt payment						$ 100,000
Debt outstanding in short term debt								400,000	400,000	400,000
Net carrying amount								$ 8,000,000.0	$ 7,800,000	$ 8,000,000.0
Senior Notes | 2.125% Convertible Senior Notes Due September 1, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additional effective rate of interest to be used on amortized carrying value								9.92%	9.92%	9.92%
Fair value of convertible debt								$ 417,200,000		$ 417,200,000
If converted, value in excess of principal									$ 44,700,000
Senior Notes | Convertible Senior Notes, 2.5%, Due March 1, 2027
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument interest percentage									2.50%
Proceeds from issuance of 2024 Notes					$ 193,300,000
Conversion price (in dollars per share) | $ / shares									$ 7.66
Purchase price as a percentage on principal amount of the notes upon the occurrence of a fundamental change					100.00%
Carrying amount of equity component									$ 67,800,000
Deferred tax liability									$ 16,200,000
Additional effective rate of interest to be used on amortized carrying value									9.92%
Fair value of convertible debt									$ 319,300,000
Principal amount									200,000,000
Amortization of debt issuance costs									365,000
Net carrying amount									131,814,000
Senior Notes | Convertible Senior Notes, 2.5%, Due March 1, 2027, Circumstance 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold trading days | d					20
Threshold consecutive trading days | d					30
Convertible threshold minimum percentage					130.00%
Senior Notes | Convertible Senior Notes, 2.5%, Due March 1, 2027, Circumstance 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Threshold trading days | d					5
Threshold consecutive trading days | d					5
Convertible, threshold maximum percentage					98.00%
Principal amount					$ 1,000
Loans Payable | Fabrinet
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument interest percentage		6.00%		3.00%
Principal amount		$ 40,000,000
Debt term		12 months		6 months
Short-term debt, net									$ 24,600,000