Commitments and Contingencies - Narrative (Details) $ in Thousands				1 Months Ended										6 Months Ended	12 Months Ended
	Mar. 09, 2017 patent	Aug. 11, 2016 patent	Oct. 14, 2008 claim	Dec. 31, 2016 claim	Nov. 30, 2016 patent	Dec. 31, 2015 USD ($)	May 31, 2015 USD ($)	Nov. 30, 2014 USD ($)	Mar. 31, 2013 USD ($)	May 31, 2012 patent	Apr. 30, 2012 claim	Jan. 31, 2011 USD ($)	Dec. 31, 2008 USD ($)	Jun. 29, 2018 USD ($) claim review	Dec. 31, 2015 patent	Dec. 31, 2014 USD ($) patent	Dec. 31, 2009 patent	Dec. 31, 2008 claim	Dec. 31, 2006 USD ($)
Loss Contingencies [Line Items]
Outstanding guarantees and letters of credit														$ 6,100
Guarantees related to capital lease obligations														104,400
Revolving Credit Facility | Line of Credit
Loss Contingencies [Line Items]
Line of credit, current borrowing capacity														15,000
Letter of Credit | Line of Credit
Loss Contingencies [Line Items]
Credit commitment outstanding														$ 100
Power Integrations, Inc.
Loss Contingencies [Line Items]
Number of outstanding proceedings | claim														8
Power Integrations, Inc. | Minimum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss														$ 4,000
Power Integrations, Inc. | Maximum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss														$ 20,000
Power Integrations, Northern District of California, 2016
Loss Contingencies [Line Items]
Loss contingency, number of patents allegedly infringed upon | patent		6
Number of patents requiring declaratory judgment | patent					2
Power Integrations, Arizona, 2016
Loss Contingencies [Line Items]
Gain contingency, number of patents allegedly infringed upon | patent					6
Number of patents requiring declaratory judgment | patent		3
Power Integrations, Delaware, 2017
Loss Contingencies [Line Items]
Loss contingency, number of patents allegedly infringed upon | patent	7
Gain contingency, number of patents allegedly infringed upon | patent	6
Power Integrations, Inc., USPTO
Loss Contingencies [Line Items]
Patents reviewed and found unpatentable | review														2
Inter party review | review														5
Fairchild
Loss Contingencies [Line Items]
Maximum remediation cost recoveries receivable														$ 150,000
Fairchild | Power Integrations, Inc.
Loss Contingencies [Line Items]
Number of outstanding proceedings | claim														5
Fairchild | Power Integrations, Delaware, 2004
Loss Contingencies [Line Items]
Litigation settlement, amount paid												$ 12,200	$ 6,100						$ 34,000
Loss contingency, number of patents allegedly infringed upon | claim																		2
Fairchild | Power Integrations, Delaware, 2004 | Maximum
Loss Contingencies [Line Items]
Value of sales and imports of affected products									$ 750
Fairchild | Power Integrations, Delaware, 2008
Loss Contingencies [Line Items]
Loss contingency, number of patents allegedly infringed upon | claim											4
Gain contingency, number of patents found infringed upon | claim											1
Gain contingency, number of patents allegedly infringed upon | claim			2
Loss contingency, number of patents infringed upon | claim											2
Loss contingency, number of patents found not infringed upon | claim				1
Fairchild | Power Integrations, Northern District of California, 2009
Loss Contingencies [Line Items]
Litigation settlement, amount paid						$ 139,800										$ 105,000
Loss contingency, number of patents allegedly infringed upon | patent																	3
Gain contingency, number of patents allegedly infringed upon | patent																	2
Loss contingency, number of patents infringed upon | patent																2
Litigation settlement, amount vacated								$ 105,000
Litigation settlement interest						$ 7,000
Fairchild | Power Integrations, Delaware, 2012
Loss Contingencies [Line Items]
Loss contingency, number of patents allegedly infringed upon | patent										5
Loss contingency, number of patents found not infringed upon | patent										1
Litigation settlement, amount awarded from other party							$ 2,400
Fairchild | Power Integrations, Delaware, 2012, 2
Loss Contingencies [Line Items]
Litigation settlement, amount paid							$ 100
Fairchild | Power Integrations, Northern District of California, 2015
Loss Contingencies [Line Items]
Loss contingency, number of patents allegedly infringed upon | patent															2
Gain contingency, number of patents allegedly infringed upon | patent															4
Fairchild
Loss Contingencies [Line Items]
Business acquisition, maximum indemnification period														6 years