Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Jan. 02, 2016	Apr. 04, 2015
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income tax provision (benefit)	$ 971,000	$ 309,000	$ 7,410,000	$ 29,030,000
Deferred tax assets, valuation allowance						$ 21,000,000
Unrecognized tax benefits that could significantly change during the next twelve months	200,000		200,000
Total potential decrease in UTB	200,000		200,000
Maximum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized tax benefits, associated interest and penalties that could significantly change within the next twelve months	$ 100,000		$ 100,000
U.S. Federal
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Statutory income tax rate	35.00%		35.00%
Bermuda
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income tax provision (benefit)	$ 0		$ 0
Statutory income tax rate	0.00%		0.00%
Internal Revenue Service (IRS)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Operating loss carryforwards					$ 339,900,000
Tax credit carryforward, amount					48,200,000
State and Local Jurisdiction
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Operating loss carryforwards					239,900,000
Tax credit carryforward, amount					55,900,000
Other Long-term Liabilities
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Uncertain tax positions	$ 29,400,000		$ 29,400,000		26,900,000
No Expiration Date
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Tax credit carryforward, amount					$ 53,400,000