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 ($)	Mar. 30, 2019 USD ($)	Sep. 29, 2018 USD ($) d $ / shares shares	Dec. 29, 2018 USD ($) d	Dec. 28, 2019 USD ($) $ / shares	Dec. 29, 2018 USD ($)	Dec. 30, 2017 USD ($)	Dec. 27, 2019 $ / shares	Dec. 23, 2019 USD ($)	Sep. 28, 2019 installment	May 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net carrying amount						$ 266,929,000	$ 323,678,000	$ 266,929,000
Payment of capped call							0	48,880,000	$ 0
Deferred tax liability						13,347,000	$ 8,700,000	13,347,000
Closing price of common stock (in usd per share) | $ / shares							$ 7.78			$ 7.78
Credit Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt issuance costs, line of credit							$ 4,900,000
Amortization of debt issuance costs							300,000
Contractual interest expense							800,000
Line of credit remaining borrowing capacity							115,900,000
Letters of credit outstanding							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]
Amortization of debt issuance costs							1,149,000	373,000
Contractual interest expense							8,553,000	2,613,000
Principal amount					$ 1,000	402,500,000	$ 402,500,000	402,500,000
Debt instrument interest percentage							2.125%
Net carrying amount						$ 266,929,000	$ 285,690,000	266,929,000
Proceeds from issuance of 2024 Notes					391,400,000
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
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%
Debt instrument term							57 months
Net equity component carrying amount							$ 128,700,000
Deferred tax liability							$ 30,900,000
Additional effective rate of interest to be used on amortized carrying value							10.07%
Fair value of convertible debt							$ 417,200,000
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]
Principal amount					$ 1,000
Threshold trading days | d					5
Threshold consecutive trading days | d					5
Convertible, threshold maximum percentage					98.00%
1.75% Convertible Senior Notes Due June 1, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization of debt issuance costs								402,000
Contractual interest expense								$ 1,094,000
Principal amount													$ 150,000,000.0
Debt instrument interest percentage							1.75%						1.75%
Additional effective rate of interest to be used on amortized carrying value							10.23%
Repayment of debt			$ 150,000,000.0
Repayment of final coupon interest			$ 1,300,000
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 term				5 years
Debt issuance costs, net							$ 8,400,000
Proceeds from debt				$ 8,700,000
Debt payment installments | installment												59
Debt payment				$ 100,000
Debt outstanding in short term debt							400,000
Net carrying amount							8,000,000
Loans Payable | Fabrinet
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal amount		$ 40,000,000
Debt instrument interest percentage		6.00%
Debt term		12 months
Short-term debt, net							$ 31,300,000