Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended					15 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	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Release of Tax Valuation Allowance and other adjustments									$ (41,200)
Sales Revenue, Goods, Net	$ 103,522	$ 99,418	$ 60,316	$ 62,093	$ 40,029	$ 25,427	$ 21,442	$ 38,200	325,349		$ 125,098		$ 142,957
Sales Revenue, Services, Net	9,871	11,422	10,651	10,591	9,889	8,352	8,216	9,468	42,535		35,925		41,434
Net sales	113,393	110,840	70,967	72,684	49,918	33,779	29,658	47,668	367,884		161,023		184,391
Cost of Goods Sold	53,247	52,502	38,179	41,426	27,499	17,283	14,146	22,422	185,354		81,350		89,169
Cost of Services	5,424	5,182	6,256	4,838	4,189	5,048	4,532	4,438	21,700		18,207		22,519
Cost of Goods and Services Sold	58,671	57,684	44,435	46,264	31,688	22,331	18,678	26,860	207,054		99,557		111,688
Gross Profit	54,722	53,156	26,532	26,420	18,230	11,448	10,980	20,808	160,830		61,466		72,703
Net income (loss)	$ 75,088	$ 33,973	$ 4,260	$ 2,902	$ (17,923)	$ (9,693)	$ (9,675)	$ (118)	$ 116,223		$ (37,409)		$ (12,257)
Basic net (loss) income per share	$ 2.19	$ 0.99	$ 0.13	$ 0.09	$ (0.54)	$ (0.29)	$ (0.30)	$ 0.00	$ 3.42		$ (1.15)		$ (0.39)
Diluted net (loss) income per share	$ 2.10	$ 0.94	$ 0.12	$ 0.08	$ (0.54)	$ (0.29)	$ (0.30)	$ 0.00	$ 3.27		$ (1.15)		$ (0.39)
Other Quarterly Information [Abstract]
Impairment of Intangible Assets, Finite-lived					$ 2,300				$ 0		$ 2,349		$ 0
Restructuring Costs					6,600
Goodwill, Impairment Loss					7,400				0		7,445		0
Business Combination, Integration Related Costs									0		366		194
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property									(197)		(1,323)		(862)
Inventory Write-down					$ 1,700				8,248		2,440		0
Restructuring costs									3,935		6,935		$ 2,824
Q4 FY17 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost									17,074		7,587			$ 24,660
Current Asset Impairments [Member] | Q4 FY17 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost									$ 13,278	[1]	$ 1,669	[1]		$ 14,947	[2]

[1] (1) Asset and facilities costs include inventory charges recorded in cost of sales.

[2] (1) Current asset impairments include inventory charges recorded in cost of sales.