New Accounting Pronouncements - Schedule of New Accounting Standards Adoption Impacts Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net Revenue			$ 82,313
Net income	$ 16,381	$ 5,352	$ 16,381
Net income per share:
Basic (in dollars per share)	$ 0.68	$ 0.21	$ 0.68
Diluted (in dollars per share)	$ 0.67	$ 0.21	$ 0.67
Calculated under Revenue Guidance in Effect before Topic 606 | Topic 606 Adoption [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net Revenue			$ 78,037
Net income			$ 13,320
Net income per share:
Basic (in dollars per share)			$ 0.55
Diluted (in dollars per share)			$ 0.54
Effect of Change Higher/(Lower) [Member] | Topic 606 Adoption [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net Revenue			$ 4,276
Net income			$ 3,061
Net income per share:
Basic (in dollars per share)			$ 0.13
Diluted (in dollars per share)			$ 0.13