(Loss) Earnings Per Share - Reconciliation of Weighted Average Shares Outstanding Used in Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Mar. 31, 2018	Apr. 01, 2017	Apr. 02, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 75,088	$ 33,973	$ 4,260	$ 2,902	$ (17,923)	$ (9,693)	$ (9,675)	$ (118)	$ 116,223	$ (37,409)	$ (12,257)
Weighted average number of shares - basic									33,967	32,551	31,411
Weighted Average Number Diluted Shares Outstanding Adjustment									1,604	0	0
Weighted average shares used for diluted earnings per share									35,571	32,551	31,411
Net (loss) income per share - basic	$ 2.19	$ 0.99	$ 0.13	$ 0.09	$ (0.54)	$ (0.29)	$ (0.30)	$ 0.00	$ 3.42	$ (1.15)	$ (0.39)
Net (loss) income per share - diluted	$ 2.10	$ 0.94	$ 0.12	$ 0.08	$ (0.54)	$ (0.29)	$ (0.30)	$ 0.00	$ 3.27	$ (1.15)	$ (0.39)