Restructuring - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Jul. 02, 2017 USD ($) employee	Dec. 31, 2017 USD ($) employee	Apr. 02, 2017 USD ($) employee	Apr. 01, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	$ 2,200		$ 2,200
Other Restructuring Plan - 2017 Restructuring
Restructuring Cost and Reserve [Line Items]
Lease obligation changes	2,500		2,500
Employee severance
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions			4,204
Accrued balance for employee severance costs	3,274		3,274	$ 4,841
Restructuring charges			2,637
Employee severance | Automotive and Industrial Division (AID) Plan
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions				4,900
Restructuring charges				5,000
Employee severance | Radio Frequency (RF) Plan
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions	1,900
Accrued balance for employee severance costs	900		900
Employee severance | HSBC Business
Restructuring Cost and Reserve [Line Items]
Accrued balance for employee severance costs	1,400		1,400
Employee severance | Other Restructuring Plan - 2017 Restructuring
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions			1,200
Restructuring charges	300		$ 2,000	$ 4,000
Number of reduced headcount (employees) | employee		16	27	59
Scenario, Forecast | Employee severance | Automotive and Industrial Division (AID) Plan
Restructuring Cost and Reserve [Line Items]
Accrued balance for employee severance costs					$ 100
Employee severance | Other Restructuring Plan - 2017 Restructuring
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions			$ 400
Restructuring charges		$ 700
Other Long Term Liabilities
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	1,700		1,700
Other Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Accrued liabilities	$ 500		$ 500