Basis of Presentation and Summary of Significant Accounting Policies - Accounting Pronouncements Recently Adopted (Details) - USD ($)	3 Months Ended	6 Months Ended
	Apr. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Financing Activities		$ 6,173,000	$ 12,124,000
Net Cash Provided by (Used in) Operating Activities		3,228,000	$ 124,427,000
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Financing Activities		$ (16,300,000)
Net Cash Provided by (Used in) Operating Activities	$ 16,300
Retained Earnings [Member] | Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adjustment				$ 4,900,000