Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaids and other current assets	$ 7,155	$ 4,669
Accrued expenses	$ 30,911	31,360
Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaids and other current assets		1,069
Accrued expenses		1,069
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaids and other current assets		3,600
Accrued expenses		$ 30,291