Business Acquisitions (Schedule of Purchase Price Allocation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Aug. 03, 2015
Business Acquisition [Line Items]
Goodwill	$ 2,384,740		$ 1,012,652
Atmel Corporation
Business Acquisition [Line Items]
Cash and cash equivalents	230,266	$ 230,266
Accounts receivable	135,427	135,427
Inventories	335,163	333,208
Prepaid expenses and other current assets	28,360	28,360
Assets held for sale	24,394	24,394
Property, plant and equipment, net	129,587	129,587
Goodwill	1,372,102	1,378,317
Purchased intangible assets	1,877,945	1,880,245
Long-term deferred tax assets	49,360	49,466
Other assets	7,535	5,948
Total assets acquired	4,190,139	4,195,218
Accounts payable	(55,686)	(55,686)
Other current liabilities	(119,469)	(119,152)
Long-term line of credit	(192,000)	(192,000)
Deferred tax liabilities	(74,885)	(74,334)
Long-term income tax payable	(168,433)	(174,380)
Other long-term liabilities	(106,688)	(106,688)
Total liabilities assumed	(717,161)	(722,240)
Purchase price allocated	3,472,978	3,472,978
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Inventories	1,955
Goodwill	(6,215)
Purchased intangible assets	(2,300)
Long-term deferred tax asset	(106)
Other assets	1,587
Total assets acquired	(5,079)
Other current liabilities	(317)
Deferred tax liabilities	(551)
Long-term income tax payable	5,947
Total liabilities assumed	$ 5,079
Micrel Incorporated
Business Acquisition [Line Items]
Cash and cash equivalents		99,196
Accounts receivable		14,096
Inventories		73,468
Prepaid expenses and other current assets		10,652
Property, plant and equipment, net		38,491
Goodwill		440,978
Purchased intangible assets		273,500
Long-term deferred tax assets				$ 11,400
Other assets		4,268
Total assets acquired		954,649
Accounts payable		(11,068)
Other current liabilities		(31,552)
Deferred tax liabilities		(88,035)
Long-term income tax payable		(7,637)
Other long-term liabilities		(127)
Total liabilities assumed		(138,419)
Purchase price allocated		$ 816,230