Nature of Business, Basis of Presentation and Significant Accounting Policies - Textual (Details) - USD ($) $ in Thousands		6 Months Ended
	Dec. 31, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 30, 2018
Accounting Policies [Line Items]
Fiscal year/fiscal quarter duration		91 days	91 days
Lease, practical expedients, package		true
Lease liability		$ 10,862
Lease payments to lessors		1,582
Operating lease, right to use asset		10,767
Topic 842 [Member]
Accounting Policies [Line Items]
Lease liability		0		$ 11,500
Lease payments to lessors	$ 100
Operating lease, right to use asset		$ 700		$ 11,600
Minimum [Member]
Accounting Policies [Line Items]
Fiscal year/fiscal quarter duration		364 days
Maximum [Member]
Accounting Policies [Line Items]
Fiscal year/fiscal quarter duration		371 days