Borrowings - 3.875% Convertible Senior Subordinated Notes (Details) - USD ($) shares in Thousands		3 Months Ended
	Jan. 05, 2017	Apr. 02, 2017	Mar. 27, 2016
Short-term Debt [Line Items]
Repayments of debt		$ 138,251,000	$ 9,000
Conversion of convertible notes, shares issued upon conversion		400	3,000
Loss on extinguishment of debt		$ 5,582,000	$ 0
Shares received from dealer counterparties		120
3.875% Convertible Senior Subordinated Notes due 2017 | Senior Notes
Short-term Debt [Line Items]
Extinguishment of debt, amount	$ 91,700,000
Principal amount of convertible debt	1,000
Repayments of debt	93,200,000
Repayments of debt, accrued interest	$ 1,500,000
Conversion of convertible notes, shares issued upon conversion	930
Loss on extinguishment of debt		$ 5,200,000